Chupacabra
Chupacabras ("Goat Suckers") are peculiar little creatures that have been terrorizing South America and Mexico. It's hobby is to suck the blood out of livestock vampire-style. Sometimes the killing can get even more bizarre, live when a farmer found his cow completely hollowed out. Somehow, all of it's insides were removed through its eyesockets.
Descriptions of what the Chupacabra looks like vary largely, most people don't even see it at all, they just find their animals drained in the yard the next morning. The most common description is that it stands on two legs, has bat wings, a tail, and spikes along his spine. Some have decribed them as being very similar to Greys.
The Chupacabra has been around for about 50 years. Though it is mainly seen around South and Central America,  it has also been spotted in other places around the world. But don't worry it doesn't eat people. Plus, it hasn't been seen since the 60's.