The powerful flight muscles of the shoulder attach to the keel, a special ... the center of the wide sternum, or breastbone. The tail feathers are used for steering. Birds have a unique digestive ...

A striking mounted specimen of a great white pelican, which has one of the most impressive skeletons of any bird Domestic pigeon skeletons belonging to Charles Darwin’s, donated in 1867. Darwin’s ...

This interpretation arises because of a keel, or ridge, that runs down the animal's sternum, which is like that found in many birds.