He's a terrestrial frog, so he doesn't swim, but they like to be near riverbanks and such. And my frog loves spending some time in the water. He also loves making messes in his water, so hopefully the very expensive canister filter will help with that.
Even though they like water, they spend a lot of their time hiding. Obviously, they look like a leaf to blend in. It seems he also prefers being in the shade of plants. And they can spend hours in the same spot waiting for prey to come to them (which is a nice contrast to the White's who immediately pounce on crickets in a clumsy manner). They're also very fast when they snag their food; if you blink you miss it.
They have at least a couple different types of croak. The first, which I've posted in a thread, sounds like the beep of a smoke detector whose battery is dying. It's very high-pitched and in your ear, even if you're a room away. Sometimes, I'll hear one single "beep" a week. But if it storms, he'll go crazy and I'll hear several an hour. From what I've read, I believe that for mating, they need a barometric drop, so that might have something to do with it. The second croak is one I heard for the first time a few weeks ago, when we discovered the bowl was leaking and the soil was soaked. It sounds like that sound from the "This is a weekly test" commercials of local channels, but it has a rhythm to it too.
Males get 4 inches long, and females get 7. Most that are available are wild-caught because there's been some trouble breeding them in capitivity, though I believe it has been done. Males are a lot less expensive because they're smaller, but also because they're easier to find. They follow the croaks, and females don't croak. And, of course, they are pretty great at hiding.
Is that the kind of info you wanted? :P