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Debating the Morality and Value of Zoos

Some readers decry keeping animals in captivity while others tout the educational benefits.

essay against zoos

To the Editor:

Re “ The Case Against Zoos ,” by Emma Marris (Sunday Review, June 13):

Ms. Marris argues that leading zoos and aquariums spend an outsized amount on “operations and construction” compared with their expenditures on “conservation projects.”

The reason modern zoos spend so much on operations is simple — effective, science-based zoological institutions focus on the welfare of animals in their care, a moral obligation that does not come cheap. American Humane , the country’s first national humane organization, certifies the humane treatment of animals in more than 60 zoos and aquariums around the globe. These zoological institutions receive our Humane Certified seal as they meet or exceed a science-based set of criteria evaluated by independent auditors who have no stake in the outcome of their decision.

Money spent on proper veterinary care, enrichment activities and nutritious food is not money wasted but rather an investment in the social, and moral, contract we have with animals. To pressure zoos and aquariums to spend less on their animals would lead to inhumane outcomes for the precious creatures in their care.

Robin R. Ganzert Washington The writer is president and chief executive of American Humane.

I am a veterinarian who was a zoo and wildlife park employee for years before obtaining my veterinary degree. Both the wildlife park and zoo claimed to be operating for the benefit of the animals and for conservation purposes. This claim was false. Neither one of them actually participated in any contributions to animal research or conservation. They are profitable institutions whose bottom line is much more important than the condition of the animals.

Animals such as African lions that bred in captivity were “culled” (killed) when their numbers exceeded the financial capability of the zoo to feed them. Baby bears, seals, beavers and other animals were taken in and used by the zoos for financial profit until they were no longer useful, and then either “culled” or released into the wild without the ability to survive. I was taught to recite a spiel on conservation to zoo visitors that was false.

Animals despise being captives in zoos. No matter how you “enhance” enclosures, they do not allow for freedom, a natural diet or adequate exercise. Animals end up stressed and unhealthy or dead.

It’s past time for transparency with these institutions, and it’s past time to eliminate zoos from our culture.

Teri Byrd Vashon Island, Wash.

As a zoology professor and, thanks to my kids, a frequent zoo visitor, I agree with Emma Marris that zoo displays can be sad and cruel. But she underestimates the educational value of zoos.

She cites studies showing that most zoo visitors do not closely read educational signs, arguing that few people experience the zoo other than as a simple family outing. However, those few who gain a serious interest in conservation add up to a lot, given that millions of people visit zoos.

The zoology program at my State University of New York campus attracts students for whom zoo visits were the crucial formative experience that led them to major in biological sciences. These are mostly students who had no opportunity as children to travel to wilderness areas, wildlife refuges or national parks. Although good TV shows can help stir children’s interest in conservation, they cannot replace the excitement of a zoo visit as an intense, immersive and interactive experience. They also get to meet adults who have turned their love for animals into a career, and with whom they can identify.

Surely there must be some middle ground that balances zoos’ treatment of animals with their educational potential.

Karen R. Sime Oswego, N.Y.

Emma Marris briefly mentions sanctuaries. Sanctuaries are a growing and ethical alternative to animals kept in captivity and “on display.” The Global Federation of Animal Sanctuaries is the accrediting body for sanctuaries, with 200 members in the United States and abroad. One hundred percent of the focus of our organization and its member sanctuaries is on the humane care of their animals.

Unlike zoos, sanctuaries receive no government or municipal funding, rely on small staffs supplemented by volunteers, and operate on shoestring budgets. They also take on the additional cost of providing lifetime care for every animal. They do not buy, sell or trade animals and restrict access to the animals, forgoing the lucrative revenue of general admission and attractions. Instead, they rely primarily on public donations for support.

For wild animals that cannot be returned to their natural habitats, true sanctuaries offer the best alternative. It’s what animals deserve and is the moral choice.

Valerie Taylor Phoenix The writer is the executive director of the Global Federation of Animal Sanctuaries.

“The Case Against Zoos” is an insult and a disservice to the thousands of passionate, dedicated people who work tirelessly to improve the lives of animals and protect our planet. Ms. Marris uses outdated research and decades-old examples to undermine the noble mission of organizations committed to connecting children to a world beyond their own.

I’ve specialized in zoo and aquarium marketing as a consultant for 20 years, working directly with animal keepers and their animals to produce commercials that feature everything from sharks to lemurs. I’ve never met more dedicated people in my life. They care for their animals as a parent would care for a child.

Zoos and aquariums are at the forefront of conservation and constantly evolving to improve how they care for animals and protect each species in its natural habitat. Are there tragedies? Of course. But they are the exception, not the norm that Ms. Marris implies. A distressed animal in a zoo will get as good or better treatment than most of us at our local hospital.

The Association of Zoos and Aquariums has been on a continual path of improvement, constantly examining its practices related to animal care and conservation throughout the world.

Most important, Ms. Marris glosses over the true value of zoos and aquariums. When a child looks a gorilla or otter or shark in the eye, something wondrous takes place. A connection is made to a world beyond our own that will live with them forever.

Greg Newberry Cincinnati The writer is president of Animal Instinct Advertising.

I quite agree with Emma Marris. Having lived in Kenya, driving in the Nairobi National Park early in the morning as the animals were beginning to move around, and experiencing the thrill of a black mane lion lying in the middle of the road as if he owned the kingdom, I do not go to zoos. To see the animals no longer able to roam, pacing in small areas, is too cruel to watch.

Frances McClure Oxford, Ohio

As a fellow environmentalist, animal-protection advocate and longtime vegetarian, I could properly be in the same camp as Emma Marris on the issue of zoos. But I believe that well-run zoos, and the heroic animals that suffer their captivity, do serve a higher purpose. Were it not for opportunities to observe these beautiful, wild creatures close to home, many more people would be driven by their fascination to travel to wild areas to seek out, disturb and even hunt them down.

Zoos are, in that sense, akin to natural history and archaeology museums, serving to satisfy our need for contact with these living creatures while leaving the vast majority undisturbed in their natural environments.

Dean Gallea Tarrytown, N.Y.

Emma Marris selectively describes and misrepresents the findings of our research . Our studies focused on the impact of zoo experiences on how people think about themselves and nature, and the data points extracted from our studies do not, in any way, discount what is learned in a zoo visit.

Zoos are tools for thinking. Our research provides strong support for the value of zoos in connecting people with animals and with nature. Zoos provide a critical voice for conservation and environmental protection. They afford an opportunity for people from all backgrounds to encounter a range of animals, from drone bees to springbok or salmon, to better understand the natural world we live in.

John Fraser Susan Clayton Wesley Schultz Dr. Fraser is the author of “The Social Value of Zoos.” Dr. Clayton and Dr. Schultz are professors of psychology.

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  • Are Zoos Good or Bad for Animals? The Argument, Explained

Debates about the ethics of zoos abound — but when it comes to animal welfare, there are certainly more cons than pros.

captive primate with person taking photo with phone, pros and cons of zoos

Explainer • Entertainment • Policy

Björn Ólafsson

Words by Björn Ólafsson

For many people, zoos are the only chance they’ll have in their entire lives to see beautiful animals native to far-flung ecosystems — lions, elephants, pandas, lemurs — the list goes on. And they’re popular — over 181 million people visit a U.S. zoo every year . But zoos face criticism from animal welfare organizations and environmental activists for inhumane treatment of the animals they claim to protect. Zoos maintain that they are important aspects of conservation and education. 

So, what are the advantages and disadvantages of zoos ?  Let’s take a look at the pros and cons of these controversial organizations. 

What Are Some Pros and Cons of Zoos ?

First, not all zoos are created equal. While it is easy to imagine animal ethics as a binary of evil and moral, zoos can vary widely on how they treat their animals, how much space they are given and how the animals are obtained. Still, most zoos tend to have the same positives and negatives overall. 

Arguments Against Zoos

Poor conditions for animals.

Animals Often Only Have Quite Limited Space

Many zoos’ enclosures are too small, especially for animal species that are used to roaming, flying or swimming large distances in the wild. For example, polar bears are used to home ranges of about 1,000 square kilometers in the wild — large swaths of land and ice they enjoy exploring . In zoos, they get a couple hundred square feet. 

Zoos Are  Crowded

In addition to limited space, many zoos cram in as many animals as possible into the enclosures. Many visitors prefer seeing animals up close, instead of peering at them from afar, hidden in their dens or nests. This encourages zoos to increase the number of animals per exhibit,  increasing the likelihood of visitors seeing animals on the move near the boundaries of the enclosure. 

Animals Are Trapped in Unnatural Environments

Anyone who has visited a zoo knows the exhibits are a far cry from the natural landscape they are trying to imitate. Nearly all zoo enclosures contain fences, glass or other barriers for visitors to look through, which are inherently artificial. And the natural-seeming landscapes can sometimes be made out of astroturf, concrete or plastic.

Confinement May Alter the Behavior of Animals

The lack of space, unnatural environments and crowded conditions can directly affect the behavior of animals ; most notably in the form of what’s known as “stereotypy.” Stereotypy is a condition in which non-human animals engage in repetitive behaviors with no apparent purpose, such as pacing for hours on end, wagging tails abnormally or picking their own fur. 

The structure of zoos increases the likelihood of stereotypic behavior due to a lack of enrichment, mundane environments and boring, repetitive schedules. This prevalence of stereotypy in zoos even has its own name: “zoochosis,” or psychosis caused by zoos . 

‘Surplus’ Animals Can Be Killed

After an animal has reproduced successfully and the zoo no longer requires the animal to maintain an exhibit, the animal is deemed “surplus.” At this point, the animal’s welfare is no longer profitable . Zoos can sell the animal to private owners (who may keep the animal in tiny cages for amusement or kill the animal for taxidermy purposes), sell the animal to other zoos or enclosures, or “euthanize” the animal. 

Animals Are Often Mistreated 

Animal mistreatment is much more than hitting or beating an animal. It also includes harmful training techniques, separation from family members and forcing animals to behave in abnormal ways. 

In a report from World Animal Protection, three-fourths of zoos include human-animal interactions , many of which can be very stressful or physically harmful for animals. In some extreme cases, visitors rode on the backs of animals (causing injury) or encroached on the animals’ enclosure (causing stress).

Investigations into popular zoos sometimes reveal that caretakers don’t always clean the exhibits frequently , leaving the animals to live near their feces. The research also reveals many zookeepers hitting animals who “misbehave,” and not helping animals with injuries sustained in the enclosures. While not all animal caretakers behave this way, the reporting suggests many zoos around the world are lax with animal welfare. 

Animals Don’t Like Being Visited

The mere presence of human beings can negatively affect wild animals, especially in massive crowds that are common at zoos. Being bombarded by the sounds, smells and appearances of swaths of humans can trigger the stress responses of some animals . Some studies show that the number of visitors correlates with the amount of stress hormones in many animal species. 

Animals Struggle to Form Connections

Many animals are highly social creatures. Elephants, lions, pigs, cows and many more species are shown to have complex connections, hierarchies and relationships with members of their own kind — especially with friends and family. However, zoo animals rarely stay with the same herd or family for their entire lives. Instead, zoos opt to transfer, sell, buy or relocate animals throughout their lifespans, making it difficult for animals to form social connections . This lack of bonding can harm the animals emotionally. 

Zoos Are for Humans, Not Animals

Most zoos are for-profit enterprises, meaning they have one goal in mind: maximizing revenue. It is easy to see how making more money can come at the expense of animal welfare. For example, a zoo is unlikely to fund an exhibit expansion if it isn’t cost-effective, regardless of its benefits for the animals inside. While many zookeepers form real bonds with their animal companions, the animals still exist under a for-profit, human-centered organization. 

Zoos Promote Human Superiority

The aesthetic nature of zoos — animals in panopticon-like enclosures, viewed 24/7 by members of a different species — can reinforce human superiority. As moral philosopher Lori Gruen writes in her book, “visitors leave the zoo more convinced than ever of human superiority over the natural world.” Of course, zoos also reinforce the idea that humans have a right to take away animals’ freedom and bodily autonomy.

Zoos Don’t Always Help with Conservation — Some Wild Animals Have to Be Caught to Bring Them to Zoos

Many animals in zoos are born in captivity, but that’s not the case for all. Many animals are taken directly from the wild , often when they are babies, to make the transition to captivity a bit easier. At times, this is done in the name of conservation, or when a wild animal is very ill. But many zoos will take animals from the wild, or buy animals from unethical animal traders. 

It’s Often Not Possible to Return Animals to the Wild

Releasing an animal into the wild isn’t always successful, especially if the animal has spent time in climates different from their native regions, like jungles, savannas or ice caps. Properly preparing animals for success in the wild is a multi-stage process that can require thousands of dollars — and it doesn’t always work . Captive-born predator species — disadvantaged by being born and raised in an artificial environment — only have a survival rate after being released into the wild of 33 percent , according to one study. As a result, re-release is not a priority for many zoos.

Zoos Are Poorly Regulated

While there exist many laws that protect animals, such as the Animal Welfare Act (AWA) and the Endangered Species Act , they only offer minimum protections . For example, the AWA excludes entire species of animals, like mice, farmed animals, birds and all cold-blooded animals. Its “minimum” standards of care usually ensure the animals’ safety, not their welfare or happiness. Many animal law experts say these regulations don’t go far enough . 

What Are the Pros of Having Zoos?

They Can Be Important for Researchers

Biologists and zoologists can benefit from studying animals in zoos. Some breakthroughs in animal behavior and treatment, like why elephants swing their trunks or how gorillas develop heart disease, have been made possible because of zoos’ ease of access . However, not all animals behave the same in captivity as they do in the wild, so not all research is possible in zoos. 

Zoos Are Educational — People May Behave “Eco-friendlier” After Going To the Zoo

Zoos can kickstart individuals’ interest in biodiversity, which is a critical aspect of environmental protection. Many zoos include calls to action in their exhibits, highlighting how endangered animals are being poached, driven away, or otherwise killed by human activity. This can inspire some people to behave more conscientiously. One limited survey found that 35 percent of eco-friendly people learned sustainable behavior from zoos . ‘

Zoos Can Help Educate Children About Animals

Zoos are a quintessential school experience for many young people. Children love learning about animals up-close in a safe environment — in fact, education is possibly the biggest advantage of modern zoos. Many programs, like school presentations, guided tours, informational exhibits, and talks with zookeepers can trigger a lifelong love of animals in children .  

But zoos aren’t perfect in this regard. According to a study of zoo visitors in the UK, only 34 percent of children learned more about animals at zoos (the result was slightly better when the children were given  a guided tour). Worse, children did not feel empowered to help with conservation efforts after visiting a zoo. This suggests that if zoos care about education, they need to more actively reach out to schoolchildren for empowerment and education. 

Going to the Zoo Is Affordable

More ethical ways of engaging with animals without removing them from their natural habitats — like whale watching, safaris, hikes, or excursions — are usually expensive or inaccessible for many people. Zoos tend to be relatively cheap for the average family that wants to learn about animals. 

Conservation

Zoos Can Protect Endangered Species from Extinction

Zoos often claim they can protect entire species from extinction through conservation programs that involve breeding more animals in captivity and then releasing them into the wild. This is especially important for endangered species like pandas. 

While these conservation efforts are truly important, they don’t represent the majority of a zoo’s activities, nor are zoos leaders in conservation worldwide. At the National Zoo, for example, only one-fifth of animals are endangered . In North America, zoos only contribute about 14 percent of all animals reintroduced into the wild as part of a conservation program. Zoos also tend to focus on headline-grabbing endangered animals to bring in visitors, like pandas, elephants or tigers, as opposed to lesser-known but crucial species, like tamarins, kakapos or wombats. 

Are Zoos Good or Bad for the Environment?

Zoos claim to support global biodiversity through conservation efforts like protecting endangered animals. This is somewhat true, although it varies greatly from zoo to zoo. 

On the other hand, zoos are big polluters and use up lots of resources , especially energy and water . Aquariums in particular use tons and tons of water. Zoo animals also generate waste that may or may not be composted or disposed of correctly.

Should Zoos Exist or Be Banned?

Given the many ways that zoos are unethical to animals, the flawed attempts to contribute to conservation, and the positioning of humans as superior to animals, many animal ethicists believe zoos should not exist — or at least, not exist in their current form . 

For example, animal philosopher Dale Jamieson says in his book Ethics on the Ark that zoos primarily “alleviate our sense of guilt for what we are doing to the planet, but they do little to help the animals we are driving to extinction.” He continues to argue that zoos exist for humans alone , and that it is very difficult to wave away the inherent immorality of depriving animals their liberty for the sake of human amusement. 

Instead, private conservation programs can benefit endangered animals without showcasing them to the public. Animal sanctuaries, which are  areas of land in which endangered and other animals are protected by humans, are also advantageous for both individual animals and global biodiversity . 

Zoos do have advantages — fostering curiosity and education chief among them. But experts believe there are other ways of accomplishing these goals without resorting to zoos with tiny enclosures. Excursions, nature documentaries, safaris, local gardens, hikes, boat tours and other ways of interacting with nature don’t involve taking animals out of their natural habitats. 

The Bottom Line

If you do choose to visit a zoo, opt for zoos that have certifications from independent animal welfare organizations. If you are interested in animal conservation, you’d be more impactful donating to a non-zoo animal protection organization instead. And if you do want to visit animals, consider an animal sanctuary or an ethical safari, where you can see animals in their native environments.

Independent Journalism Needs You

Björn Jóhann Ólafsson is a science writer and journalist who cares deeply about understanding the natural world and her inhabitants through stories and data. He reports on the environmental footprint of the meat industry, the alternative protein sector and cultural attitudes around food. His previous bylines include the EU Observer and Elemental. He lives in Spain with his two lovebirds.

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Are Zoos Ethical? Arguments for and Against Keeping Animals in Zoos

Zoos, if done right, could be a good thing for the animals and the public—yet many so-called zoos get it terribly wrong.

essay against zoos

  • University of Southern California

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  • Ohio Wesleyan University
  • Brandeis University
  • Northeastern University
  • Animal Rights
  • Endangered Species

A Brief History of Zoos

Arguments for zoos, arguments against zoos, the last word on zoos.

A zoo is a place where captive animals are put on display for humans to see. While early zoos (shortened from zoological parks) concentrated on displaying as many unusual creatures as possible—often in small, cramped conditions—the focus of most modern zoos is conservation and education. While zoo advocates and conservationists argue that zoos save endangered species and educate the public, many  animal rights activists believe the cost of confining animals outweighs the benefits, and that the violation of the rights of individual animals—even in efforts to fend off extinction—cannot be justified.

Humans have kept wild animals for thousands of years. The first efforts to keep wild animals for non-utilitarian uses began about 2500 BCE, when rulers in Mesopotamia, Egypt kept collections in enclosed pens.  Modern zoos began to evolve during the 18th century and the Age of Enlightenment, when scientific interest in zoology, as well as the study of animal behavior and anatomy, came to the fore.

Early zoos were a dismal affair. Animals were kept in small enclosures with little if any, greenery. With a scant understanding of what the various animals needed, many perished relatively quickly. In accredited U.S. zoos (and elsewhere) things are better now, fortunately. Primates, for example, have gone from barren cages with little furniture to naturalistic and sometimes semi-free-ranging designs. But is it enough?

  • By bringing people and animals together, zoos educate the public and foster an appreciation of other species.
  • Zoos save endangered species by bringing them into a safe environment, where they are protected from poachers, habitat loss, starvation, and predators.
  • Many zoos have breeding programs for endangered species. In the wild, these individuals might have trouble finding mates and breeding, and species could become extinct.
  • Some zoos have conservation programs around the world that use the zoo's expertise and funding to help protect wildlife against poaching and other threats.
  • Reputable zoos accredited by the Association of Zoos and Aquariums are held to high standards for the treatment of their resident animals. According to AZA, its accreditation guarantees that the organization has undergone strict evaluation by recognized experts to ensure the highest standards of "animal management and care, including living environments, social groupings, health, and nutrition."
  • A good zoo provides an enriched habitat in which the animals are never bored, are well cared for, and have plenty of space.
  • Seeing an animal in person is a much more personal and more memorable experience than seeing that animal in a nature documentary and is more likely to foster an empathetic attitude toward animals.
  • Some zoos help rehabilitate wildlife and take in exotic pets that people no longer want or are no longer able to care for.
  • Both accredited and unaccredited animal exhibitors are regulated by the federal Animal Welfare Act, which establishes standards for animal care.
  • From an animal rights standpoint, humans do not have a right to breed, capture, and confine other animals— even if those species are endangered . Being a member of an endangered species doesn't mean the individual animals should be afforded fewer rights.
  • Animals in captivity suffer from boredom, stress, and confinement. No pen—no matter how humane—or drive-through safari can compare to the freedom of the wild.
  • Intergenerational bonds are broken when individuals are sold or traded to other zoos.
  • Baby animals bring in visitors and money, but this incentive to breed new baby animals leads to overpopulation. Surplus animals are sold not only to other zoos, but also to circuses and hunting facilities. Some zoos simply kill their surplus animals outright.
  • Some captive breeding programs do not release animals back into the wild. The offspring may be forever part of the chain of zoos, circuses, and petting zoos.
  • Removing individual specimens from the wild further endangers the wild population because the remaining individuals will be less genetically diverse and may have greater difficulty finding mates. Maintaining species diversity within captive breeding facilities is also a challenge. 
  • If people want to see wild animals in real life, they can observe wildlife in the wild or visit a sanctuary. (A true sanctuary does not buy, sell, or breed animals, but instead takes in unwanted exotic pets, surplus animals from zoos, or injured wildlife that can no longer survive in the wild.)
  • The federal Animal Welfare Act establishes only the most minimal standards for cage size, shelter, health care, ventilation, fencing, food, and water. For example, enclosures must provide "sufficient space to allow each animal to make normal postural and social adjustments with adequate freedom of movement. Inadequate space may be indicated by evidence of malnutrition, poor condition, debility, stress, or abnormal behavior patterns." Violations often result in a slap on the wrist and the exhibitor is given a deadline to correct the violation. Even a long history of inadequate care and AWA violations, such as the history of Tony the Truck Stop Tiger, does not necessarily ensure abused animals will be freed.
  • Animals sometimes escape their enclosures, endangering themselves as well as people. Likewise, people ignore warnings or accidentally get too close to animals, leading to horrific outcomes. For example, Harambe, a 17-year-old western lowland gorilla, was shot in 2016 when a toddler accidentally fell into his enclosure at the Cincinnati Zoo. While the child survived and was not badly injured, the gorilla was killed outright.
  • Petting zoos have been linked with numerous incidents of diseases including E. coli infection, cryptosporidiosis, salmonellosis, and dermatomycosis (ringworm).

In making a case for or against zoos, both sides argue that they're saving animals. Whether or not zoos benefit the animal community, they certainly do make money. As long as there is demand for them, zoos will continue to exist.

Since zoos are likely an inevitability, the best way to move forward is to ensure that zoo conditions are the best possible for the animals that live in captivity and that individuals who violate animal care health and safety sanctions are not only duly punished but denied any future access to animals.

One day we may look back at zoos and marvel at their barbarity. Or, one day we may look back at zoos and be grateful for the species they saved from extinction. Of these two scenarios, only time will tell.

Hosey, Geoff, et al. Zoo Animals: Behaviour, Management, and Welfare . Oxford University Press. 2013.

Hosey, G. (2023). The History of Primates in Zoos . In: Robinson, L.M., Weiss, A. (eds) Nonhuman Primate Welfare. Springer, Cham.

“ Species Survival Plan Programs .” Association of Zoos & Aquariums.

“ Accreditation Basics .” Association of Zoos & Aquariums .

“ Animal Welfare Act and Animal Welfare Regulations .” U.S. Department of Agriculture .

Meagher, Rebecca K., Georgia J. Mason. “ Environmental Enrichment Reduces Signs of Boredom in Caged Mink .” PLoS ONE , vol. 7, 2012, doi:10.1371/journal.pone.0049180

Kleiman, Devra G., et al. Wild Mammals In Captivity: Principles And Techniques For Zoo Management, Second Edition . University of Chicago Press. 2010.

Gunasekera, Crystal Allen. “ The Ethics of Killing “Surplus” Zoo Animals .” Journal of Animal Ethics , vol. 8, 2018, doi:10.5406/janimalethics.8.1.0093

Brichieri-Colombi, Typhenn A., et al. “ Limited Contributions of Released Animals from Zoos to North American Conservation Translocations .” Conservation Biology , vol. 33, 2019, pp. 33-39., doi:10.1111/cobi.13160

Krasnec, Michelle O., et al. “ Mating Systems in Sexual Animals .” Nature Education Knowledge, vol. 3, no. 10, 2012, p. 72.

“ 9 CFR § 3.128 - Space Requirements .” Cornell University Legal Information Institute .

“ Animal Welfare Act Enforcement .” U.S. Department of Agriculture .

Conrad, Cheyenne C. Conrad et al. " Farm Fairs and Petting Zoos: A Review of Animal Contact as a Source of Zoonotic Enteric Disease ." Foodborne Pathogens and Disease, vol. 14, 2017, pp. 59-73., doi:10.1089/fpd.2016.2185

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Five of the Strongest Arguments Against Zoos

A while ago I wrote an article about some of the good things zoos do for conservation . Now I hadn’t realized how vehemently some people hated zoos (and sadly, how afraid many great zoos are about sticking up for their work). Suddenly, it became one of my most read articles.

Every time something bad happened, like the gorilla that escaped (but didn’t) , journalists call around looking for someone on each side of the argument. Luckily for them, Born Free and PETA are all to happy to point out the negatives. Meanwhile, everyone closely involved with zoo’s seems to keep a low profile, and a little stuck, journalists end up asking me for a comment.

Now, I’ve never worked in a zoo, but I do believe in balance – in seeing both sides of an argument. So I’m very happy to advocate good zoos, and only good zoos from a conservation perspective ( my article about the great stuff they do is here). But all that doesn’t mean that zoos can’t improve.

I thought I’d take the chance to highlight some of the things I think they could do better – starting with the very arguments used against them.

Common Problems With Zoos

1. keeping animals in cages is cruel, and we don’t have the right..

Yep, captivity is certainly cruel to an extent. But for me it depends greatly on scale, and how well you can replicate the natural environment. It’s a lot harder to make a nice environment for a lion, than it is for a critically endangered crayfish or snail that’s extinct in the wild .

I’d definitely like to see bigger zoo enclosures, with fewer, if any, really large animals (I’m thinking lions, tigers, elephants). But at the same time, where a species is seriously endangered – for example the Amur leopard (~200 in captivity), Asiatic Lion (<400), I think there’s a great argument for captivity and captive breeding programmes too.

It depends, I suppose, which you think is worse: captivity or extinction? I believe it’s the latter, but of course I can see how some people feel it’s the former.

2. Zoos are just for entertainment.

I’d agree that some folks go to zoo’s for entertainment, whilst some folks go to learn. But by far the biggest group, is the grey area in between.

Now the difference between the good zoos and bad, is that good zoos work harder and harder towards making those experiences educational – or at least they say they do . What isn’t debated, is the fact that 24 million people visit zoos in the UK every year. So like it or lump it, let’s make those visits worthwhile.

Zoos deliver what the public wants. So the best way to influence the zoo experience is to be a discerning customer. Be fussy, if you don’t agree with them, don’t go. But in the same vein, if there’s parts you do like, then speak about that too.

Here’s how:

  • People go to see animals. So the bigger the enclosure, the harder it is for those exhibits to be seen. The public needs to tolerate that much better (how often to you overhear people moaning that an animal isn’t out on display?)
  • Big animals draw in visitors. So embrace the little stuff too – that’s arguably where zoos are doing some of their most worthwhile work .
  • Don’t read those rubbish alarmist stories about Gorillas that I deliberately havn’t linked to, because if you read them, newspapers will keep writing them.
  • And don’t go rushing to a zoo just because it’s had a baby panda/polar bear/tiger. Because it doesn’t help encourage responsible behavior.

3. Zoo keepers are cruel.

This is a weird one, that I don’t agree with. Yet the stories come up again and again . Most people ‘like’ animals and wildlife – especially folks that work at zoos. In my experience, zoo keepers have been some of the most passionate conservationists I know.

4. If you want to see animals, you should go see them in the wild.

Hey, I agree! Great!

Ecotourism, in it’s many flavours – if done right – can be a great force for conservation .

But lots of people can’t, don’t or wont. Perhaps for many, it’s the zoo or not at all? Or maybe if there were no zoos it really would make more of us embark on that once in a lifetime trip to Africa… It’s hard to know.

In any case, when it comes to zoos I’d turn to science, and ask the question: Does seeing animals in a zoo, make you more engaged with conservation in the wild? Fortunately, there’s lots and lots of literature on this, and it seems like they do .

But here’s the most important point: If you want to see the biggest most exciting mammals, then you really should go to the wild – your experience would be all the richer for it. Put it this way, would you rather see a caged tiger a dozen times in your life, or just once, wild, after a long arduous journey in the breathtakingly beautiful Ranthambore wetlands with the birds singing and sun setting. I know which I’d choose.

5. None of the money from zoos goes towards conservation

Here’s my take: I’d like to see more spent on overseas conservation of the species they exhibit. At the same time, I’d like to see a much clearer link between the two. Visiting a zoo should support conservation not just in captivity, but in the wild – and it should be crystal clear. That’s the aspiration.

The good news is that many zoos are doing this already, but perhaps it slips under the radar for the casual visitor. London Zoo work all over the world , Colchester Zoo runs Action for the Wild , I’ve even won a grant to work in Mozambique from WWCT , which run Paignton Zoo.

But is it enough? On this topic, I’d recommend this excellent article . The jist of which is:

“A few years ago Los Angeles Zoo spent $42 million on a new, six-acre enclosure for Asian elephants…” meanwhile… “…at many zoos, Boyle says, only 1 percent of the budget goes to conservation. He says AZA is pushing members to get to 3 percent, but there’s no minimum required donation for AZA accreditation by the association. A boost to 10 percent would send $800 million a year to wildlife”

One more thing…

6. A little note about branding and hypocrisy….

Whilst I often hear people lambasting zoos, animal sanctuaries seem to be the greatest thing since slices bread. But I’d say for many, there’s little difference except branding.

One of the ironic things, is that PETA even has a list of criteria for a ‘good sanctuary’ , which funnily enough matches, more or less, the characteristics of a good zoo.

A few more articles on the topic:

  • Are Wildlife Sanctuaries Good for Animals?
  • How Captivity Helps Conservation
  • Introducing the Modern Zoo
  • Arguments For and Against Zoos
  • When You Walk Into a Zoo, Are You Helping Animals or Hurting Them?

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Are Zoos Good or Bad for Animals?

Please try again

Zoos are great, right? You get to be up close and personal with some amazing animals that you’d pretty much never get to see in the wild. Clearly, zoos are a win for people. But when it comes to the animals, zoos might cause more harm than good. Should zoos exist?

TEACHERS: Guide your students to practice civil discourse about current topics and get practice writing CER (claim, evidence, reasoning) responses. Explore lesson supports.

How did zoos become a thing? Humans have been capturing and displaying exotic animals for thousands of years. The earliest known collections date back to 3500 BCE in Egypt, where rulers kept hippos, elephants, baboons, and different species of large cats. Now back then, that didn’t mean that your average Egyptian could go check any of that awesomeness out. These early zoos were really just a way for kings to flex on other kings. Modern zoos, where the public can come and watch animals exhibiting their natural behavior, didn’t really become a thing until the early 1800s. The longest continuously operating zoo in the world is the Vienna Zoo, which has been going strong for more than 260 years.

What are the arguments in favor of having zoos? Zoos may be great entertainment, but their big goal is to educate the public about wildlife and what we can do to protect them. Zoo animals are sort of like ambassadors for their counterparts in the wild. Zoos also contribute to scientific research. “Zoo” is short for zoological park, and zoology is the scientific study of animal biology and behavior. In addition, zoos work really hard to save animals that are threatened in the wild. Zoos can take at-risk animals, breed them in captivity, and then reintroduce them back into the wild.

What are the arguments for NOT having zoos? Zoos have their problems. Not all zoos are created equal. Some are clean and well staffed, others aren’t. There are some in the richest cities in the world, and there are some in conflict zones. What this means is that not all zoos have the resources to properly care for the animals they house. And for many critics, no amount of education or research justifies keeping animals captive. That captivity can be REALLY bad for both physical AND psychological health. And while zoos have been really helpful is saving endangered animals, it doesn’t work out for certain species. For example, most large carnivores like lions and tigers that are bred in captivity die when released into the wild. It turns out that they haven’t developed the natural behaviors they need when they’re out on their own and have to fend for themselves.

SOURCES: Do we need zoos? (The Atlantic) https://www.theatlantic.com/news/archive/2016/06/harambe-zoo/485084/

Why zoos are good (The Guardian) https://www.theguardian.com/science/lost-worlds/2014/aug/19/why-zoos-are-good

The case for the end of the modern zoo (New York Magazine) http://nymag.com/intelligencer/2014/07/case-for-the-end-of-the-modern-zoo.html?gtm=bottom

Zoos and their discontents (New York Times Magazine) https://www.nytimes.com/2014/07/06/magazine/zoo-animals-and-their-discontents.html

Stress and lack of exercise are killing elephants, zoos warned (The Guardian) https://www.theguardian.com/science/2008/dec/12/elephants-animal-welfa re

Most Captive-Born Predators Die If Released (National Geographic) https://www.nationalgeographic.com/animals/2008/01/predators-captivity-habitat-animals/

Captive Breeding Success Stories (PBS) https://www.pbs.org/wnet/nature/the-loneliest-animals-captive-breeding-success-stories/4920/

Quantifying the contribution of zoos and aquariums to peer-reviewed scientific research (Facets Journal) https://www.facetsjournal.com/doi/pdf/10.1139/facets-2017-0083

Evaluating the contribution of zoos and aquariums (Conservation Biology) https://warwick.ac.uk/fac/soc/sociology/staff/jensen/ericjensen/moss_jensen_and_gusset_2015-evaluating_the_contribution_of_zoos_and_aquariums_to_aichi_biodiversity_target_1_final_published_version.pdf

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  • Is Keeping Wild Animals In Zoos Unethical?: Arguments For And Against

A caged animal often leads a miserable life.

A zoo is an establishment that displays animals typically for recreation and education. Extensive collections of animals that were maintained in antiquity cannot be considered as zoos. Such ancient collections were not held for exhibition in public parks or maintained for purposes of education and recreation. For example, the Romans kept collections of wild animals for ancient games. After the conquest of Dacia, Emperor Trajan  held 123 days  of games in celebration, during which thousands of animals were slaughtered, including elephants, lions, rhinoceroses, tigers, giraffes, crocodiles, bulls, hippopotami and stags. Major cities often had arenas and animals in stock for the games. In the fifth century, France had 26 such arenas, and the tradition held on until at least the 8th century. Large animal collections were also kept as a sign of power. The first modern zoos were established in the 18th century in Madrid, Vienna, and Paris. The cities of Berlin and London later founded zoos in the nineteenth century. The first American zoos were established in the 1970s in the cities of Cincinnati and Philadelphia. Today there are hundreds of zoos in the US that are visited by millions of people every year.

Arguments In Favor Of Zoos

The role played by zoos in educating the public is the most popular argument in favor of establishing and maintaining zoos. In 1898, the  reason was cited  by the New York Zoological Society when it resolved to inform the public of the continued decline in animal populations, to stimulate sentiment in favor of animal protection, and to cooperate with scientific organizations to ensure the preservation of species. Modern zoos play a critical role in the education of children and families about the various animals found on our planet. Staff from the zoo also travels to schools to make presentations or to offer special programs in the zoo to educate visitors. Zoos also partner with local communities to extend the knowledge of animals and conservation to a wider audience.

Protection Of Endangered Animals

In the course of history, various species have been wiped-out or pushed to the brink of extinction. Currently, several animal species are classified as endangered, vulnerable, and near-extinct by the IUCN. Placing such animals in zoos, especially those hunted and poached, provides them with a safe environment where the species can thrive. With the dangers of climate change fast approaching, such measures are proving extremely important for the conservation of species. Recently Australia has had to face an unprecedented wave of bush fires that have been blamed on climate change. The fires have destroyed vast areas of habitat and killed millions of of animals, including Kangaroos, koalas, and other species unique to the continent. Experts believe that such fires are expected to occur more frequently and at a higher intensity. It is, therefore, essential to have animals in zoos and other areas where they can be accorded extra protection from such unpredictable events.

Captive Breeding

Zoos provide areas where captive breeding can be carried out for release into the wild. For example, in 1945, about  13 Przewalski horses  were captured and placed in a zoo before they disappeared from the wild in 1966. Extensive breeding programs at the zoo and reintroduction into wild habitats helped in saving the species from extinction. Today there are over 1,500 Przewalski horses that are descendants of the 13 horses that were placed in a zoo at the end of WWII. Other animals that have been preserved in protected areas such as zoos include the Golden Lion Tamarin, Arabian Oryx, Freshwater mussels, and the Puerto Rican Parrot.

Economic Benefits To The Community

In addition to providing residence to animals, zoos create jobs and tourism opportunities that generate revenue for the local community. For example, Woodland Park Zoo, situated in Seattle, pays $17 million in wages annually. The zoo also pays $5.2 million for vendor contracts. The zoo generates 70% of its revenue from zoo visits and contributions.

Specialized care

Today zoos are staffed with highly trained personnel having specialized knowledge on the animals they are tasked to care for. Animals in the zoo are therefore guaranteed the best care that is available outside their native environment. Many zoos also have veterinarians, pathologists, and technicians who can provide specialized care to animals, including parasite removal and other forms of treatment. Zoo personnel are also aware of the physical and dietary requirements that each species needs to maintain them in a healthy state. The animals are involved in activities that help them remain, among other things, mentally alert and fit. Activities do not adequately replace migration and hunting requirements for animals, but they do eliminate deterioration and boredom at the zoo.

Scientific Research

 Zoos support scientific research by allowing scientists easy access to specimens or species under study. Research that is conducted in zoos is mainly in the fields of behavioral studies, anatomy, and pathology. Such studies create models that help improve zoo conditions so that animals can live longer, breed more successfully, and be happier. Many zoos currently work in collaboration with universities that research the facilities and train professionals such as veterinarians who can then help care for animals.

Arguments Against Zoos

essay against zoos

Today most zoos have become recreation facilities where people can go and view animals for entertainment and amusement. Taking an animal from its natural habitat for the sole reason of human entertainment raises several moral and ethical issues. Most experts agree that the pleasure we take from viewing animals is not a good enough reason for holding animals in captivity. Since visits to zoos will, in most instances, be for amusement, some zoos are addressing the moral dilemma by allocating revenues earned to further research and preservation efforts of various wildlife species.

Animal Welfare Overlooked

In some zoos, animal welfare is often overlooked, leaving captive animals to suffer under conditions that are psychologically and physiologically damaging. For example, lions and a black bear that used to live in Magic World Zoo in Aleppo, Syria, were  abandoned at the  zoo to face starvation and injury when the Syrian Civil war broke out. Once they were rescued, they were found to be suffering from malnutrition, kidney, and cardiac problems, as well as trauma from living in a war zone. There are also numerous instances of animal cruelty in zoos. Another example is that of a lion named Cameroon and a tiger named Zabu that were  rescued from a  rundown roadside zoo in 2004 and transferred to a Florida Sanctuary. At their previous home, the two animals were kept captive by their owners, who tried to make them make produce liger cubs. 

Adverse Effects Of Unnatural Conditions

Even if the zoos where the conditions are okay, holding some animal species in captivity can adversely affect their wellbeing. For example,  orcas do poorly  in captivity. Wild orcas live for up to 100 years but live for less than 30 years when kept in captivity. Zoos are also unable to create exact replicas of the natural environment. For example, it is impossible to replicate the natural environment for elephants, which are known to travel 30-50 kilometers each day in the wild. The Alaska Zoo, for example, was struggling to maintain Maggie, the elephant, due to the weather conditions. The elephant was often forced to stay inside in a tiny enclosure to escape the conditions. The zoo eventually bought her a treadmill to help her get some exercise, but she refused. Due to a lack of activity, the elephant's feet began to deteriorate to a point where it became difficult for her to walk.

Breeding Programs Create Dependencies

Zoos that practice breeding programs face challenges when reintroducing animals back into the wild. Predators bred in zoos, for example, grow accustomed to life in the zoo and have  trouble adapting  to a change in the environment when they are sent back to the wild. In some cases, the animals die after being released from captivity due to a lack of necessary survival skills.

Change In Animal Behavior Due To Captivity

Restriction of some animals such as elephants adversely affects their migratory instincts leading to aggressive behavior. About  75 elephants  in various zoos have had to be euthanized before reaching the age of 40. Aggressive behavior, particularly among predatory species, can pose a significant risk to zookeepers and visitors.

Overpopulation

Baby animals are a major attraction in many zoos. Some zoos continuously breed animals to get new-borns to keep visitors coming and revenue streams flowing. In addition to raising ethical and moral questions on such breeding, frequent births  lead to overpopulation  in a zoo with limited space. Zoos sometimes sell surplus animals to other zoos or circus rings and hunting facilities. In some cases, the animals are euthanized. Regardless of the way they are disposed, animals end up depressed when separated from one another. Mothers whose new-borns are ripped away from them become stressed and depressed for the remainder of their lives.

Animals And Liberty

There are  two main points  of view when considering animal liberty. The legal standpoint where animals are considered property and the ethical perspective where it is deemed to be unethical to force animals to remain in a small enclosure. It is essential to know that the issue of animal rights has been factored into various national and international laws indicating that there is a need to protect animal welfare. The inclusion of legislation on animal rights, however, does not adequately address the question of  animal liberties . To that extent, experts have suggested that we have to consider whether we have duties to animals or not. By acknowledging that we have obligations to animals, we should, therefore, respect their interests, needs, wants, and rights.

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  1. Are Zoos Immoral?

    A guest opinion essay argues that modern zoos are harmful to the health and well-being of animals. Do you agree? Is it time to rethink the zoo, and perhaps even end them?

  2. Debating the Morality and Value of Zoos

    July 3, 2021. Share full article. Peter Fisher for The New York Times. To the Editor: Re “ The Case Against Zoos ,” by Emma Marris (Sunday Review, June 13): Ms. Marris argues that leading...

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    Tue August 8th, 2023. 10 min read. For many people, zoos are the only chance they’ll have in their entire lives to see beautiful animals native to far-flung ecosystems — lions, elephants, pandas, lemurs — the list goes on. And they’re popular — over 181 million people visit a U.S. zoo every year.

  4. Are Zoos Ethical? Arguments for and Against Zoos

    Arguments Against Zoos. The Last Word on Zoos. A zoo is a place where captive animals are put on display for humans to see. While early zoos (shortened from zoological parks) concentrated on...

  5. Pro and Con: Zoos

    Zoos educate the public about animals and conservation efforts. Zoos save species from extinction and other dangers. CON. Zoos don't educate the public enough to justify keeping animals captive. Zoos are detrimental to animals' physical health. Zoo confinement is psychologically damaging to animals.

  6. Five of the Strongest Arguments Against Zoos

    1. Keeping animals in cages is cruel, and we don’t have the right. Yep, captivity is certainly cruel to an extent. But for me it depends greatly on scale, and how well you can replicate the natural environment.

  7. Are Zoos Good or Bad for Animals?

    Zoos are great, right? You get to be up close and personal with some amazing animals that you’d pretty much never get to see in the wild. Clearly, zoos are a win for people. But when it comes to the animals, zoos might cause more harm than good. Should zoos exist?

  8. Is Keeping Wild Animals In Zoos Unethical?: Arguments For And ...

    A caged animal often leads a miserable life. A zoo is an establishment that displays animals typically for recreation and education. Extensive collections of animals that were maintained in antiquity cannot be considered as zoos.