From ostriches to pigeons, there are many kinds of birds on Earth. How did they evolve? How have they changed to fit their environment? This book answers these questions and more as it brings readers face to face with birds of all sizes, shapes, and abilities. Readers will learn about early birds, such as the Archaeopteryx, and what weve learned from their fossils. Theyll also learn about the classifications for birds that are alive today, such as perching birds, raptors, and flightless birds. Colorful pictures, diagrams, and sidebars take readers on an adventure to meet these amazing feathered friends.