Carlos Dos Orsos, better known as just Carlos is a character and one of the group of mexican cowboys in the 1969 classic, The Valley of Gwangi. He is one of T.J.'s two boyfriends, the other being Tuck Kirby. He was portrayed by the late Uruguayan actor Gustavo Rojo.
Although he was originally part of the gypsy clan, he was one of the good guys, and was shown to be very heroic and courageous towards Lope (Curtis Arden), particularly when he saves his life by breaking the neck of, and killing the dinosaur that attempted to kidnap Lope.
Gwangi was the apex predator, or top pretator in his area, similar to the tyranosaurs that lived in Hell Creek, Montana durring the Late Cretaceous. Gwangi defeated any dinosaur in his path, which means he wasn't too scared when he encountered humans. After captured, and set free, Gwangi continued his agressive behavior, and starts fights with the other circus animals (Elephant). Eventually Gwangi dies in a fire and faced a horrible death under the falling rubble of the church he was led into.
Carlos was first seen as part of Tia Zorina'a gypsy posse, but redeemed himself and joined the cowboys instead. He tried to escape the valley with the others, but in a tragic and unexpected twist, he was killed by Gwangi.
- Harryhausen originally intended for Gwangi to be an Allosaurus, but based the design on a Tyrannosaurus.
- Gwangi's apparent color changes several times over the course of the movie because there was so much animation to do that Harryhausen did not have enough time to do proper color testing.
- Gwangi is a native American word that means lizard.