Approximately 10,000 different species of birds inhabit our planet—from the two-ounce hummingbird to the 330-pound ostrich—thriving in every possible habitat. Divided by geographical areas, this worldwide guide for readers 9 to 12 features magnificent and detailed illustrations of each bird discussed. The text summarizes the most important aspects of a bird's life, including environment, food, reproduction, and distinctive behavior, with additional facts about the varying colors of plumage, impressive courtship and mating displays, and extraordinary flight skills.