They depend on both parents for several seeks. Precocial birds - lay many eggs and incubate them for a long period. The young birds are active as soon as they hatch. They can walk, swim, and feed themselves. Males attempt to attract females with courtship displays.
Birds migrate to escape poor weather and food supply.
Use this essay planning guide to write an essay with your ideas about the theory that birds are decended from dinosaurs. More than any other animal, birds are identified by color. The feathers give each species a very distinctive coloration and males and females of most are usually easy to identify from their coloration. Even egg shell color can be used for identification. Nests of most bird species are very distinctive and can be used for identification.