A bird is a warm-blooded animal that has feathers, wings, and a beak. Most birds can fly, thanks to their lightweight bodies and strong muscles. They come in many shapes, sizes, and colors, from the tiny hummingbird to the large ostrich. Birds are found all over the world, in forests, deserts, and even cities. Birds lay eggs, which they often care for until they hatch. They communicate with each other through songs and calls, making their presence known in nature. Some birds, like eagles and sparrows, are known for their unique behaviors and adaptations that help them survive in their environments.