Michio Kaku, crocodiles have no recognised finite lifespan. Instead, they just get bigger and bigger until they’re inevitably killed out by “starvation, accidents, or disease.” This is the reason we don’t happen to see crocodiles the size of Boeing 747s in the wild.
At what age do alligators die?
Many other animals also use these burrows after their builder abandons them. American alligators live about 50 years in the wild. After they are 4 feet long, alligators are safe from predators except humans and occasionally other alligators.