Pteropus

Background
A species which lived on cliff sides, who were very adept at long distance gliding

Abilities
While they could fly, it seemed to require a lot of strength, so they could only fly for a while every day, and after that they could not even glide. If they did not fly, they could rend armor with the wind, so defending against it was very difficult. They were a species which was strong when they could not fly.