Warriors fanfic: Weightless , Book one in the Legacy series

There is a group of cats hidden deep within the rainforest, existing only in the trees. High above the ground, vines are woven together into tight ropes, trees are hollowed out to provide safe dens, and cats have learned to evolve in order to survive. Their fur is short, but thick in order to deal with the fluctuating temperatures. Their claws are thick and tough, in order to grip the vines and trees better. They have developed heightened smell, sight, and hearing. But most of all, these cats have grown wings.