Avoid the 'Roid

In the Squawk Role-Playing Game, a gremlin is an intelligent primitive bird or bird-like dinosaur without feathers. Gremlins have one of the proportionally largest brains of all the intelligent species, but they are one of the smaller species.

Large eyes with cat-like pupils give gremlins excellent vision in a wide range of lighting conditions. Gremlins have a limited sense of smell because of their short snouts. They have only three fingers on each hand (a thumb and two other fingers), but each touch-sensitive soft-tipped finger is both strong and dextrous. A vertical spinal column and modified shoulders give them an improved range of arm motion as well as balancing the brainy skull.

(The narrow hips of the floating gremlin above is a degenerate condition related to living in low gravity. Most gremlins have wide hips which form the round bottom half of an egg-shaped torso.)

Gremlins are plantigrade - they walk on their heels. This helps their vertical posture, but they have very long feet and run with all of their weight on a single toe. This is similar to the way humans run, but more extreme. Gremlins have one other toe which helps them balance while standing and walking. The inside toe - which is often adapted as a sickle-claw or reversed and elongated for perching in other birds and bird-like dinosaurs - is completely absent in gremlins.

Gremlins are partly inspired by paleontologist Dale Russel's speculative "Dinosauroid". Zoology blogger Darren Naish has proposed a much better candidate for super-intelligent dinosaur ancestor and surreal artist Nemo Ramjet has provided a nice illustration.