Phrynonax poecilonotus

Phrynonax poecilonotus is a species of nonvenomous snake in the family Colubridae. The species is endemic to the New World.

Common names
P. poecilonotus is commonly known in Trinidad and Tobago as dos cocorite, in Brazil as papa-ovo, and in English as the puffing snake or the bird snake.

Geographic range
P. poecilonotus is found from Mexico through Central America to northern and central South America and Trinidad and Tobago.

Diet
P. poecilonotus apparently eats any terrestrial vertebrate small enough to handle and is well known as a predator of bird eggs (hence some of the common names).

Description
P. poecilonotus is one of the most variable snakes in the world. For about the first year of their life, they look very dull in color, and even look all the same upon hatching. for the first four years of their life, the snake's appearance will change rapidly, from slate grey and yellow, to slate and orange, etc. Past the first four years of life, changes will be very slow, but they will change in appearance. The snakes can be combinations of black with red, orange, yellow, and/or lavender, or slate and red, yellow, orange, and/or lavender. However, when handled, their behavior is similar, and they will readily bite.