There's a fresh baby white rhino down at Busch Gardens, and you can help name her if you'd like. But what do you call a young rhinoceros just generically? As the rhinocerati well know, they are called calves, and here is a website where you can find out what other animal youth (as well as males, females, and groups of those animals) are called. My favorite term that I wasn't previously familiar with is puggle, a baby platypus (and it turns out that's also what you get when you mate a beagle and a pug).