Trivial Tuesday

This week I am going to start a new idea with Trivial Tuesday.  Whoever gets the correct answer will get to choose the category for the next week.  This allows for a little interactivity as well as a chance for a link.  We start this week where I will name the category:

Supernatural Phenomenon

The Question:

This mythical being, usually with sightings in the southwest and Latin American countries, translates from Spanish literally to "Goatsucker."  What is it?

Good luck.  I am moderating comments, so make your guess and I will reveal the answers tomorrow.