A tree viper is a venomous snake that primarily resides in trees and preys on small animals and birds. It is also known by several other names such as arboreal viper, bushmaster, and green pit viper. The name arboreal viper refers to its habitat in the trees, while bushmaster derives from its ability to camouflage itself among the bushes. The green pit viper is named after the green coloration that is visible on some species' backs. Other synonyms for a tree viper include lancehead, fer-de-lance, and lash snake. These names are usually based on the snake's shape, color, or venomous bite.