The Classifying Animals series welcomes you to the world of classification, in which about 2 million different organisms have been identified and sorted into groups. This appealing and attractive book looks at the class of birds, and the orders, families and species within it. - Find out about the characteristics that distinguish the birds in different groups. - Compare the differences in their life cycles. - Discover the various ways in which birds have adapted to life in different climates and habitats on land, in the air and in water.