Capybara
In the wild, capybaras face a gauntlet of predators that significantly impacts their lifespan. Jaguars, caimans, anacondas, and ocelots all consider the capybara an excellent source of protein. Under these conditions, the average wild capybara survives four to eight years. In captivity, where the primary threats are overfeeding and boredom rather than apex predators, capybaras can reach 12 years of age. Their large body size for a rodent—typically a factor correlating with increased longevity—is offset by the metabolic demands of their bulk and their vulnerability to various health conditions. The capybara's lifespan is respectable for a rodent but unremarkable in the broader mammalian context.
Cat
The domestic cat has benefited enormously from human intervention in matters of survival. Modern veterinary care, balanced nutrition, and protection from predators have extended feline lifespans dramatically. Indoor cats routinely live 15 to 20 years, with some exceptional individuals reaching their late twenties. The oldest verified cat, Creme Puff of Austin, Texas, lived to the remarkable age of 38 years and 3 days. Even outdoor cats, facing cars, diseases, and territorial disputes, typically survive 10 to 15 years. This longevity allows cats to form deep, lasting bonds with their human companions across significant portions of human lifetimes—a factor that undoubtedly contributes to their enduring popularity.