Illustrations and simple text teach children about birds, providing information on their physical characteristics, behavior, and life cycle. Part of the "Amazing Science: Animal Classification." Interest Level: K-3 Reading Level: 3.7 ATOS Book Level: 4.2 AR Interest Level: LG AR Points: .5 AR Quiz: 131528EN Lexile Measure: 770 Lexile Code: IG (Illustrated Guide) Guided Reading Level: N Fountas & Pinnell: M.