Mountain Boomer Max Height: 7ft (2.1 metres)
Max Length: 18 ft (5.5 metres)
Max Weight: 660lb (300 kilos)
Agressiveness: 1 [inoffensive]
Background Info: The Mountain Boomer is a small sized (by dinosaur standards) bipedal dinosaur evolved from a Thescelosaurus-like ornithopod.
Female Mountain Boomers are generally 6 to 7 feet tall while smaller males are usually 3 to 5 feet high. The males have a more vivid coloration than the females.
The Mountain Boomer are found everywhere ... but tend to nest in the more remote mountain regions where they sleep lives in caves or burrows.
Its is extremely fast, swift and agile, easily being able to outrun a human or other predator. Additionally, it has a tremendous leap.
The creatures are shy and reclusive, fleeing as defence.
They have a strange wolf-like howl. [This last can be discounted as a mistaken actual wolf howl]
River LizardMax Height: 3.5 ft (1 metre)[to five feet]
Max Length: 5 ft (1.5 metres)[to 2 meters/ 7 feet long]
Max Weight: 33 lb (15 kg)
Diet: Omnivore, Insectivore
Rarity: Very common
Background Info: The River Lizards, as they have come to be known, are a genus of small theropod dinosaur. Their exact evolutionary history is not known at the current time, although a veriety of primitive ornithomimosaur similar to Pelecanimimus or Harpymimus is the most widely accepted theory. Other suggestions have been made that they are perhaps descended from a member of the Troodontidae, or Dromaeosauridae families...[Afterwards bogging down in the Taxonomy]
Both of these models can easily be combined into a description of one kind of "Minidinosaur" and the size given for the "River Liz" matches the"Mountain Boomer" male. In fact there is no reason to make the size differences into sex differences rather than growth stages. The "River Liz" head should similarly be shortened and roundish, and the coloration of both being in basically a green background shading to gray in parts like the belly, overlaind by large irregular brown bands or splotches. The back has a sort of a crest on it and there may be hornlike structures on the head. All of this is in agreement with the actual reports. Whereas originally I was unwilling to allow the "Female" sizes indicated here in the reports I saw, they are actually in the reports that way, and so my disallowal was more a matter of opinion than anything else.
There has been a recent rash of soghtings of the "MiniRex" lizards that resembled this in the Four Corners area around Hogsback NM. The reports in general (With or without mentioning the frill) are comparable in scale to the dinosaur comparisons made on the charts below:
Then there is the South American "Iguanodon" of Heuvelmans:
SaruMax Height: 9.8 ft (3 metres) [9 ft?]
Max Length: 33 ft (10 metres) [24 ft? As per reports]
Max Weight: 3.5 tons (3.0 metric tonnes)
Background Info: The Saru is an bizarre herbivorous dinosaur of which has been subject to an extreme amount of evolutionary adaptability. Surprisingly descended from a sauropod, like the Mokele-Mbembe... This adaptation seems to have occurred in order for the animal to fill the ecological niche of the Iguanodonts and Hardrosaurus which are surprisingly absent ....
Behaviour: A herbivore often seen browsing on mid-height vegetation. The Saru can be aggressive if attacked and can kill small predators but prefers to flee in most circumstances.
It is terrestrial but can swim if need be. It moves very slowly, balancing with its long tail.
Unknown LIZARD of South America.
Physical description: Large monitor lizard.
Distribution:Galeras de El Pao, in Guárico and
Cojedes States, Venezuela; near Angel Falls, Bolí-
var State, Venezuela; the Cerro Santa Ana, Penin-
sula de Paraguana, Falcón State, Venezuela.
Significant sightings: A prospector from Cara-
cas told ecologist Léon Croizat in 1972 that a
large lizard resembling a Komodo dragon lived
in the Galeras de El Pao. Herpetologist J. B. Graham saw a large, unknown lizard near the base of the Cerro Santa Ana in 1976 or 1977.
Sources: Silvano Lorenzoni, “More on Extant Dinosaurs,” Pursuit, no. 47 (Summer 1979):
105–109; Silvano Lorenzoni (letter), Pursuit,no. 50 (Spring 1980): 95.
In this case I think we have a fair assumption that we are dealing with one wide-ranging species of Iguanid lizard, blamed for "Chupacabras" crimes in something like its "Mountain Boomer" form, and in which the tropical form in South America could be larger than the subtropical, drier-climate forms in the US SW and in Northern Argentina. The largest ones are really big (20-30 feet maximum is alleged, half of that is probably much more common and more nearly the maximum of the subtropical form) but can still rear up on their hinder legs to about ten feet tall (also alleged in the first instance I heard as being on record in the USA, but I still doubt that report) The smaller ones are omnivores and insectivores but the larger ones are more often herbivorous (but may also take carrion or else perhaps root around in the stomachs of freshly-killed sheep and cattle, eating out the stomach contents?)