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.
Orions are demonstrably mammals, but unfortunately fictional.
You can’t prove that. Orions are real, do not slander the Word of the great prophet Roddenberry, Peace Be Upon Him.