This isn't any ordinary tree frog, this frog has claws and wings! The reason for the claws is that, unlike normal tree frogs, this guy doesn't have sticky feet so that he can stick to a leaf or tree or something. So, he uses his claws to climb stuff, kinda like a cat.
And the wings are mainly just for show, he can't fly with them like a bird would, they're just there so that if he falls off of anything, he can glide safely down to the ground.
Oh, and the name isn't pronunced 'Chicken'. It's pronounced 'Chee-Kahn'.