Canebreak Rattlesnake (Crotalus horridus atricaudatus)
… a subspecies of the Timber Rattlesnake. In this photo the heat sensing pits are visible between/below the eyes and the nostrils. Pit vipers are able “see” the heat that objects give off, as they are interpreted by the visual cortex in the brain. You may also notice here, that there are no visible ear holes, as snakes do not have ears, while legless lizards do have ears and visible ear holes.
What a pretty baby! :3
Photo credit: Frupus/Flickr