 A five @-@ year investigation into accounts of the chupacabra , a well known <unk> , revealed that the original sighting report of the creature in Puerto Rico by Madeline <unk> may have been inspired by the character Sil . This was detailed in paranormal investigator and <unk> Benjamin Radford 's book Tracking the <unk> . According to Virginia <unk> of Memorial University of Newfoundland writing for the Journal of Folklore Research , Radford found a link between the original <unk> report and the design of Sil in her alien form , and hypothesized that " [ Species ] , which [ <unk> ] did see before her sighting , influenced what she believes she saw of the chupacabra . " 
