BIRDS
MAKE UP THE CLASS AVES.There are more than 9,000 species
, almost all of which can fly.(the only flightless birds
are Penguins , ostriches, rheas,cassowaries, and kiwis ).The
ability to fly is reflected in the typical bird features ;
forelimbs modified as wings , a streamlined body ; and hallow
bones to reduce weight.
ALL birds lay hard-shell eggs , which the parents incubate.Birds beak and feet vary according to diet and way of life .Beak range from general purpose types suitable for a mixed diet .Feet range from the webbed "paddles" of ducks to the talons of bird of prey.
Plumage also varies widely , and in many species the male is brightly coloured for courtship display where as the female is drab.
ALL birds lay hard-shell eggs , which the parents incubate.Birds beak and feet vary according to diet and way of life .Beak range from general purpose types suitable for a mixed diet .Feet range from the webbed "paddles" of ducks to the talons of bird of prey.
Plumage also varies widely , and in many species the male is brightly coloured for courtship display where as the female is drab.
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