August 2018 1 44 Report
BIRD are a class of the vertebrates,the aves. More than 9000 different species of birds are know.they are warm - blooded and lay eggs. their bodies are covered with feathers and they have wings. feathers have three functions : flight , temperature regulation and display. most birds have hollow main bones with air sacs in them.the makes them light and makes flight easler. brid are bipedal : they have two legs which are often covered with scales ( small,flat plates witch over - lap in the same way aas feathers ). they have a hard beak with no teeth, they have many colour
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