The bush viper usually comes in green but is also available in other flavors, including red, orange, gray, yellow, black, blue, olive, and brown. 

This arboreal snake lives in the rainforests and woodlands across Nigeria, Kenya, Tanzania and Angola. It is lethargic, sometimes not moving for several days. 

This guy is small, adults grow to 32 inches, but its venom has been known to kill humans.