What makes a bird a bird fishes reptiles and mammals are also vertebrates however birds are unique in having the following features birds have feathers which are modifications of the outer skin birds are the only vertebrate with feathers. Feathers all birds have evolved feathers composed of keratin and other proteins and light reflecting pigments to serve as body insulation different types of feathers may also be ornamental such as plumes crests or streamers other feather types help birds control their flight while some feathers such as down are strictly for insulation. Birds evolved from small reptiles more than 160 million years ago they still share some characteristics with reptiles such as laying eggs and having scales on their legs and feet development of the ability to fly required not only feathers and wings but good eyesight a sense of balance and fine muscle coordination. What makes a bird a bird learn about the characteristics of birds wings feathers beak or bill no teeth lay eggs etc instructions get ready gather the following materials weve linked to our suggested choices but feel free to substitute nest by jorey hurley our feathered friends activity page from massaudobon dry erase board you can also use a chalkboard or even just paper
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