What is the survival rate of animals in zoos?

More than 80 percent of mammals survive longer in zoos than in the wild. This was true even of carnivores, according to study co-author Marcus Clauss, professor of nutrition and biology of zoo and wild animals at the University of Zurich.



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Only recently has there been enough data on the longevity of wild animals to establish whether animals live longer in captivity or in the wild. A study of more than 50 mammal species found that, in over 80 per cent of cases, zoo animals live longer than their wild counterparts.

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This study reviewed 45 case studies, involving 17 carnivore species, and found that only 30% of captive animals released survived.

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Dewitz said that generally speaking, zoo animals tend to live about twice as long as their counterparts in the wild, with the most common causes of death being conditions brought on by old age.

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Polar bears are the animals that do worst in captivity. Carnivores such as polar bears, tigers, cheetahs, and lions are especially poorly suited for life in a zoo, according to a new study. The more an animal roams in the wild, the researchers found, the worse it fares in captivity.

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Protection Against Extinction Even currently, many species are going extinct across the globe, and many more are facing the threat of extinction. Modern zoos and aquariums help combat these problems. Breeding programs help preserve genetic biodiversity and help reintroduce critically endangered species into the wild.

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AZA-accredited zoos and aquariums have collaborated on breeding and reintroduction programs that have helped save at least nine species like California condors, black-footed ferrets, Przewalski's horse, golden lion tamarins, American red wolves, and more from the brink of extinction.

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Key differences between animals in wild vs in captivity Additionally, wild animals may have greater genetic diversity and adaptability than those in captivity. This allows wild animals to better survive in changing conditions, while captive animals may be more vulnerable to environmental changes.

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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.

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Many animals in zoos now receive special diets and supplements, physical therapy, and even chemotherapy if they get sick. Some zoo animals get thorough medical care and end up living far longer than they would in the wild.

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What Are Some Pros and Cons of Zoos?
  • Animals Often Only Have Quite Limited Space. ...
  • Zoos Are Crowded. ...
  • Animals Are Trapped in Unnatural Environments. ...
  • Confinement May Alter the Behavior of Animals. ...
  • 'Surplus' Animals Can Be Killed. ...
  • Animals Are Often Mistreated. ...
  • Animals Don't Like Being Visited. ...
  • Animals Struggle to Form Connections.


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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.

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Anything remaining will be cremated, including even the tiniest of animals. “Everything from guppies to elephants is incinerated,” says Neiffer. While burials were once commonplace at zoos, very few bury their animals anymore.

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Most animals confined in zoos are not endangered, nor are they being prepared for release into natural habitats. In fact, it is nearly impossible to release captive-bred animals, including threatened species like elephants, polar bears, gorillas, tigers and chimpanzees into the wild.

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Animals at these unsafe, non accredited zoos are often at risk for overbreeding, which can lead to overcrowded zoo spaces, with animals being sold to other zoos and circuses without as much thought to each animal's best interests.

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One of the most common forms of mistreatment is inadequate and limited living conditions. For example, tigers and lions have about 18,000 times less space in their captive enclosures than what they would have in the wild, and polar bears have one million times less space.

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The Cruelty of Roadside Zoos: Why You Should Never Visit These Highway Hellholes
  • Barry R. Kirshner Wildlife Foundation. ...
  • Hovatter's Wildlife Zoo. Kingwood, West Virginia. ...
  • MarineLand. Niagara Falls, Ontario, Canada. ...
  • Oswald's Bear Ranch. Newberry, Michigan. ...
  • Pymatuning Deer Park. ...
  • Suncoast Primate Sanctuary. ...
  • Tregembo Animal Park.


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