"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. It helps you find out about the characteristics that distinguish the birds in different groups. It also helps you compare the differences in their life cycles and discover the various ways in which birds have adapted to life in different climates and habitats on land, in the air and in water.