Appendicular skeleton

The appendicular skeleton provides support and structure for movement. In a 2-3 page paper, describe how the bones of the appendicular skeleton differ
between two different classes of animal (i.e. birds vs mammals, or reptiles vs birds, or mammals vs reptiles). Up to 3 additional pages of figures, images or
drawings may be included to illustrate differences.
Compare and contrast anatomical differences in the appendicular skeleton as they relate to the functions of the limb in that species. This may be
adaptations for flight, running, swimming, or other means of motility.
Mammals and reptiles please