[All of this information is making his head spin a bit, but he does his best to keep up. Not only did he not know about phylogenic trees, just the amount of time it would take for cats and tigers to evolve separately into their own species is orders of magnitude longer than he'd ever considered.]

They sound like leopards - that's another ancient cat I've heard stories about. But I thought they didn't exist anymore.

[He sends over a mental image of the RiverClan cats - sleek, muscular, and only ever seen from across the giant river. He hasn't been to a Gathering yet, so he hasn't met any of the other Clans up close.]

RiverClan cats can swim, I know that much. They lived on an island in a river, and hunt fish all day. So it must not be that difficult, if I put my mind to it.