I’m not sure where you heard that most animals don’t live as long in captivity. You probably hear about animals living shorter lives in captivity not because it’s more common but because it’s weird and that makes it news worthy.
About 80% of mammals live longer in captivity than in the wild. This is for several reasons. Lack of predators, medical care, abundant food, and a protected habitat are four of the big ones.
An animal that is raised in captivity faces no predators, is treated for diseases or injury and fed a well balanced diet with included supplements. . A Capybara in the wild *is* food for any number of predators, has no treatment for even the slightest injury that leads to death, and eats mostly grass and vegetation.
> For most other animals, captivity shortens their lifespan.
[That isn’t true.](https://www.discoverwildlife.com/animal-facts/do-animals-live-longer-in-zoos/)
Animals in zoos are safe from predation, get treated for diseases, and get fed regardless of their competitive fitness.
There are exceptions, such as elephants, which live much longer in the wild.
> For most other animals, captivity shortens their lifespan.
This really depends on the type of captivity. Yes, a fox held in captivity for its fur will have a shorter lifespan than in the wild, but animals in zoos(where capybaras are usually kept) tend to life far longer than in the wild. reasons already have been posted by other people.
Almost all animals live longer in captivity than they do in the wild. The few species that don’t are unusual.
Animals live longer in captivity because they are exposed to fewer dangers, generally eat a healthy and balanced diet, and will receive veterinary care and checkups when needed. These are all things which, obviously, improves lifespan.
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