What is your

[blightedchemist]

My favorite would also have to be Agalychnis callidryas. I've been in love with them since I was very young.
Though of course all tree frogs are beautiful.
Kurt, I believe Duellmanohyla soralia are also referred to as Brook frogs. At least that is what
Brook frog - Duellmanohyla soralia - Information - ARKive says about them.

[Kurt]

There you go, I didn't know that. It kind of makes sense since Duellmanohyla uranochroa is called the red-eyed stream frog. Duelmanohyla is a great genus of frogs, too bad most of them are endangered.