Emerald tree boas are a non-venomous boa species found in the rainforests of South America. They are known to be very similar to the green tree python. They are bright green in colour with a yellow coloured underside. They have an irregular zigzag stripe along their back and they reach lengths between 1.5 and 2 m (5 - 5.5 ft). They have a strong prehensile tail which helps them to move around between the branches of trees. They spend their days coiled over branches with their head resting in the middle of the coils and they hunt at night. Their eyes have vertical pupils which help them to sense movement and they have deep pits in the scales around their mouth for detecting heat given off by their prey.