09 December 2009

What is a Bird? 2

A bird is in the animal Kingdom. It is a in the phylum Chordata, subphylum Vertebrata (fish, amphibians, reptiles, and mammals are other examples of vertebrates). As such, birds have a backbone, notochord, and pharyngeal clefts. (Be sure you can define these terms.)

They lay eggs with shells (other egg-layers include reptiles and some mammals (which?)).

They have a 4-chambered heart (as do some reptiles and all mammals).

Birds are warm-blooded (as are mammals).

And birds EXCLUSIVELY have feathers, outgrowths of skin that cover and streamline the body

Great Blue Heron


  1. Can someon tell me what those words that he said to define mean? I looked one up, but it had MORE words that I needed to find.

  2. Is the reason an animal is warm blooded due specifically to the 4 chambered heart and its ability to provide plenty of oxygen for metabolism compared to 3 and 2 chambered hearts?