Birds, fish, reptiles, amphibians, insects? Sure. But no mammals.
So I had to google it. Apparently, there is a sloth that moves around so slowly moss grows all over it and it doesn’t care. So it may appear green, but only in the sense that it wears it.
iirc, the reason tigers are black and orange stripey is because deers and whatever else they eat don’t see orange, they see green. This blends the tiger in with the surroundings better.
That’s why hunters’ jackets are bright orange. Hides them from game (whilst simultaneously making them visible to other people)