The chupacabra is a modern cryptid tradition that began in Puerto Rico during the 1990s and spread rapidly through news reports, rumor, and popular culture. It is not an ancient creature with a continuous pre-Columbian history.
Puerto Rican reports
The name means goat-sucker and refers to claims that livestock were found dead with puncture wounds and little visible blood. Early descriptions often presented a bipedal, reptile-like creature with spines along its back. No verified specimen established such an animal.
Later reports in the continental United States frequently used the name for hairless four-legged animals. Photographs and carcasses in those cases have usually proved to be coyotes, dogs, or related animals affected by mange or decomposition.
Folklore, fear, and evidence
Livestock deaths can result from dogs, native predators, disease, scavenging, or mistaken interpretation after death. The absence of blood at a scene does not demonstrate that an animal was drained, since blood remains inside tissues and settles after death.
The chupacabra matters as a study of how a late twentieth-century legend crosses languages and borders. Separating that cultural history from zoological proof allows the stories to be examined without presenting an unverified species as fact.