Birds- An Introduction

A bird has been described as a ‘FEATHERED BIPED’. This description is apt and precise and can apply to no other animal. Birds are warm-blooded vertebrate animals that have wings feathers a beak no teeth a skeleton in which many bones are fused together or are absent and an extremely efficient one-way breathing system. Flying birds have strong hollow bones and powerful flight muscles. Birds range in size from the tiny hummingbirds to the huge Ostrich and Emu. The science behind evolution early extinct and extreme of birds are quite interesting and imperative one.