Why do healthy animals die in zoos?

Animals may be killed because their genes are “overrepresented” in captive wildlife populations or to make room for younger animals who attract larger crowds. Animals may also fall victim to what the zoo industry refers to as “management euthanasia” if they have illnesses that zoos don't want to spend money treating.



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The practice of management euthanasia, though not often made public, is relatively common, with estimates that European zoos within the European Association of Zoos and Aquaria (EAZA) euthanize between three and five thousand animals each year (Barnes 2014).

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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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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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Some animals may be handed over to natural museums, taxidermists, universities etc. Some animals (like hoofstock) can be fed to carnivores, if their death is caused by fatal injury or they were intentionally culled (and local law allows it). I don´t think any zoo has a special graveyard.

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According to National Geographic, Zoochosis is a neurological disorder that plagues nearly 80 percent of zoo animals and is characterized by symptoms of depression and anxiety in nonhuman animals kept captive.

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The vast majority of the animals held captive inside their compounds are depressed. They live in perpetual captivity and lack access to all of the things that make life interesting and enjoyable. And, often, they die far earlier than they would if they lived in nature. As it turns out, zoos do far more harm than good.

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Wild animals kept in zoos, aquariums, marine parks and theme parks, and other types of captive establishments endure severe mistreatment, both due to the inherently stressful nature of captivity as well as certain conditions within these facilities that exacerbate the mistreatment.

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Animals in captivity across the globe have been documented displaying signs of anxiety and depression.

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Captivity suppresses the natural instincts of wild animals. Animals suffer permanent frustration because they have no freedom of choice and cannot behave as they would do in their natural environment. This leads to a tendency toward genetic, physical and behavioural degeneration.

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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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After the zoo closes, keepers feed the animals and help them get ready for the night. CORALIE: Some zoos had people work the night shift. It's their job to feed the baby animals and check on the adults. MOLLY: Some keepers even have to pick up animals at the airport.

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The vet departments at zoos also take care of animal health and well-being and treat sick or injured animals not only in captivity but also in the wild.

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How do they dispose off (sorry for language) a dead giraffe? Zoos often incinerate the bodies of dead animals, even very large ones, because they don't have space to bury them, and there may be concerns about parasites, disease, or drug residue in the body such that it would be a bad idea to let other animals eat it.

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Captive animals seldom learn crucial survival skills and often are too habituated to human contact. Lacking a natural fear of humans, they are vulnerable to poachers and ill equipped for life in the wild.

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