Encyclopedia of Birds_Bird Knowledge Resource Library - Animals Top 10

Birds

Birds are advanced vertebrates that are adapted to life on land and in the air. Birds in China are divided into six categories: waterfowl, wading birds, climbing birds, land birds, raptors, and songbirds. These six categories are collectively referred to as the six major ecological groups of birds. There are many species of birds, spread all over the world, and the ecology is diverse. There are more than 9,020 known bird species in existence, and more than 1,400 species in China.