Bioraptors - Reptilian Aliens from the movie Pitch Black
Bioraptors are reptilian aliens from Pitch Black. They have something decidedly pterodactyl-like about them.
They got powerful wings, which double up as front legs, armed with nasty claws. Their sensory organs, which function as a biosonar, are placed wide-apart on a hammer-like head.
They "see" in dark extremely well, but they have a blind spot right in front of they noses - the fact which Riddick, the main character of the movie, exploits to a great effect.
These reptilian aliens are exceptionally sensitive to light to a degree that their skin burns the moment it is shone upon. They live in caves under ground on a dry arid planet which has three suns. They come out only during the eclipse, which comes around every 22 years.
As it happens, the planet in the movie houses the two like (related?) species of these reptilian aliens, which the characters in the movie conveniently call, the "little boys", and the "big boys".
If there is not enough food to go around, the creatures resort to cannibalism. There is always a cousin too sweet to resist!