The common vampire bat, Desmodus rotundus (Mammalia: Chiroptera: Phyllostomidae: Desmodontinae).
Date 03/25/10
Author Desmodus https://commons.wikimedia.org/wiki/User:Desmodus
Source: https://commons.wikimedia.org/wiki/File:Desmodusrotundus.jpg

The common vampire bat (Desmodus rotundus) is a small, leaf-nosed bat native to the Americas. The common vampire bat mainly feeds on the blood of livestock, approaching its prey at night while they are sleeping. It uses its razor-sharp teeth to cut open the skin of its hosts and laps up their blood with its long tongue.