This paste-up is also from the files of the Frontiers of Zoology group and features the CFZ's own chupacabras representation.
I had remarked before that I first heard of a chupacabras creature in the mid 1970s as a FOAF report originating in the American SW: and it was described basically as being like a small spiky-backed dinosaur or a big iguana lizard, said to be raiding livestock. It was actually a story meant as an explanation of 'cattle mutilations', then a big news item. so the first example I heard of was a cattle-mutilations creature that was a spiky-backed lizard, and the name chupacabras not invented for such a creature yet.
I have since learned that there is a traditional Mexican version of this small dinosaur creature, usually said to raid graves and eat the bodies. A version of the legend has made its way into standard D&D lore as the fantasy creature known as the bone-snapper.
At any rate, when chupacabras reports proper started to emerge later on, several of the reports specified a small dinosaur or large spiky-backed lizard creature, sometimes said to run or jump away on its hind legs. The montage cuts together several representations of these.
Eberhart's Mysterious Creatures has an entry on such creatures under the heading 'Giant North American Lizard' but the first name I heard in common usage for them was Mountain Boomer. Other sources call them 'Mini-Rex.' And Ivan Sanderson's archives included separate letters from two unrelated sources writing about such a 'Small dinosaur' from the Arkansas-Oklahoma area, neither one of which was ever published. Some iguanid lizards do get up and run away on their hind legs, including the collared lizard (the more usual 'Mountain Boomer').
When the spiky-backed 'Chupacabras' reports started coming out of Puerto Rico, some sort of large iguanid lizard might have been involved. It probably would not be the same species as reported in Texas, Arkansas-Oklahoma, Colorado, Arizona and Mexico but it could have been something similar. The depiction does look like the front end of an iguana. And male iguanid lizards are known to have red eyes.
If it is necessary to be said, I don't think the lizards actually do any cattle mutilations or goat-sucking, or even digging up graves and breaking the bones. They only get blamed for that. What does that most often (and in just about the whole world over) is feral dogs, and they leave regular dog tracks (Ref. photos also on file in the group)