Fleshreaver

From an article on GamingNexus:


 * Fleshreavers are horrible, fleshy monsters with an unusual method of evolution. A young fleshreaver is born as barely more than a small skeleton; the parents assure the survival of their young by layering muscle, tissue, and flesh over the delicate newborn.
 * Sewn together by older fleshreavers, they use only the finest musculature and bone from prey to flesh out the body and wings of their young, carving horns from the discarded bone fragments. Once a fledging fleshreaver has been fully created, it must continue the handiwork of its parents, acquiring new flesh pieces and better musculature to attach to its skeletal structure in order to supplant its rapidly growing form.