) are some of the most feared snakes in Mesoamerica, as their …

The common cantil (Agkistrodon bilineatus) is a poly-typic species of North American pitviper with a variably fragmented distribution extending from extreme south-western Chihuahua and southern Sonora, Mexico, to northwestern Costa Rica, on the Pacific versant, and parts of the Yucatan Peninsula, northern Belize, Guatemala,