Juvenile Common Bird Snakes are strongly patterned and highly arboreal.
A common snake in Amazonian Peru, the actual range of this feisty snake is from Mexico through most of northern South America. Both the genus and the species/subspecies names for this snake are currently in flux. Some refer to it as Pseustes poecilonotus, some as Phrynonax polylepis, and others simply refer to it, as I have, as the Common Bird Snake. At the moment I’ll also use the long-standing name of Pseustes poecilonotus for its scientific designation. The snake simply doesn’t care what you call it but is apt to display resentment if you approach it too closely.

We have found many of these snakes, but have never yet found one that was happy to see us. Neck distention, similar to that of the better known Spilotes, is a defensive ploy that may be used before, during, or after the snake has struck at you. Bird snakes are nonvenomous. Juveniles are strongly patterned and quite arboreal often being found at face level or above in trailside trees. Adults are more often found resting at night while coiled atop fallen trunks or simply on the trail.

The common name comes, of course, from this snake’s fondness for birds and their eggs. Small mammals, lizards, frogs, and insects are also eaten.