I remember an episode of Man vs. Wild where he gave a ridiculously long list of animals whose combined total hippos top.
Found the list: "Lions, Elephants, Rhinos, Buffalo and Leopards combined"
Bear Grylls is known to have lied about a crapload of things. And would you trust a man who drinks water from elephant dung? Bear's good for entertainment value (even if his eating habits on the show are a little sickening), but for facts and survival stuff, I'd be more inclined to believe someone like Ray Mears.
Yeah, and good luck making those hippo bastards endangered.
They actually are at risk of becoming endangered because of poaching and the loss of their natural habitats. Less chance of making them extinct in the game, though
While we're at it, could you tell me if tamed hippos will even breed? I've heard that some animals don't breed in captivity, and I wanted to know about hippos before I go to the trouble of looking for a suitable embark and then catching them.
Yes, they will. I'm actually struggling to think of ones that wouldn't. There have always been question marks and significant doubt about the breeding prospects of megabeasts (dragons and the like) even if you mod in child tags for them, but with any standard creature that you can capture and tame, I can't think of any except the mule that wouldn't breed. All you need is for them to be tame, uncaged and for there to be a breeding pair, and your tame female will give birth to tame infants.