Amazon tree boas can grow to about six and a half feet in length. Like all boas, they are nonvenomous snakes with large front teeth for grasping prey. They have large pits in their lip for sensing heat.
These snakes are known for their highly variable coloration. They can be black, grey, brown, green, yellow, orange, red, or even a mix of different colors. Some have no pattern, some have bands or stripes, and some have different shapes or designs in yellows, reds, and oranges.