It's hard to imagine this fella climbing all the way up there. In my head, he was trying to escape the chaos down on the ground, and get a little peace (though not quiet).
Sea lions are distinguishable from seals because they have ears (tiny tiny ones, but there are little flaps of skin that you can see), and because they can actually move around on land with something that you wouldn't call grace until you'd watched a seal try the same move. Oh, and sea lions are a lot bigger.