The phenomenal reporting of the Chupacabra hit its height of popularity in the 1990's, when Puerto Rican newspapers came out with stories of vicious livestock attacks. Directly translated, Chupacabra is Spanish for "the goat sucker," and it got its name appropriately by literally sucking the life out of its numerous animal victims which include chickens, rabbits, turkeys, and of course goats.
The attacks have since spread throughout South America and recently into the southern U.S. Witnesses describe the beastly animal as about 3 feet in height, with grey 'alien-skin' and spinal quills. Its movement is that of a kangaroo, hopping about while its snake-like tongue protrudes its enormous overbite.
This vampire-esque vermin is either an incredibly well supported myth, or a genetic mutation gone wrong. Read more about the most recent chupacabra sightings here.