The Chupacabra is often described as a reptilian creature with leathery or scaly greenish-gray skin and sharp spines running down its back. It is typically said to be about 3 to 4 feet tall and stands on two legs. Reports of its habitat vary, but it is commonly associated with rural and forested areas in Latin America, particularly Puerto Rico, Mexico, and the southwestern United States. 

Source: Radford, Benjamin. "Tracking the Chupacabra: The Vampire Beast in Fact, Fiction, and Folklore." University of New Mexico Press, 2011.  

Chupacabras are notorious for their alleged attacks on livestock, particularly goats, from which they get their name ("goat-sucker"). They are said to drain the blood from their prey, leaving puncture wounds. Sightings have been reported since the mid-1990s, with varying descriptions and locations, contributing to the creature's mysterious and elusive nature.

 Source: Cohen, Daniel. "Monsters You Never Heard Of." Dodd, Mead & Company, 1991.