Why Do Birds Sing - Easy-to-Read Puffin Author:Joan Holub The title question is one of the last ones to be answered in the book, but leading up to it readers will learn quite a lot about birds. The variety is astounding?9,000 kinds of birds ranging in size from those that weigh a few ounces to those that weigh more than a couple of kids. Birds have feathers to keep them warm and to help them fly, but n... more »ot all birds can fly. All birds do hatch from eggs and most have to be cared for by parents during the early days and weeks of their lives. Some, like newborn chickens and ducks, can fend for themselves shortly after birth. Characteristics such as eyesight, coloration, nest building, grooming, food sources and ability to sing are described. In answer to the title question, birds sing to attract mates, to identify themselves and to give warnings. Other interesting tidbits are that birds learn from other birds while they are young, a bird's song is distinctive and while some keep learning and adding to their repertory, others can sing only one song.« less