Birds
Birds makeup the class aves. There are more than 9000 species. almost all ofæhich can fly. Thereability to fly is reflected in the typical bird features.fore limbs modified as wings, a streamlined body, and hollow bones to reduce Geight.
Birds makeup the class aves. There are more than 9000 species. almost all ofæhich can fly. Thereability to fly is reflected in the typical bird features.fore limbs modified as wings, a streamlined body, and hollow bones to reduce Geight.