Bird - Wikipedia
Birds are a group of warm-blooded vertebrates constituting the class Aves (Latin: [ˈaveːs]), characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweight skeleton.
Search, All About Birds, Cornell Lab of Ornithology
Detailed information for more than 600 North American bird species, including ID help, browse by shape and taxonomy, and deeper articles.
Bird | Description, Species, Feathers, & Facts | Britannica
2024年12月24日 · Bird, any of the more than 10,400 living species unique in having feathers, the major characteristic that distinguishes them from other animals. They are warm-blooded vertebrates more related to reptiles than mammals.
Guide to North American Birds | Audubon
Explore more than 800 North American bird species, learn about their lives and habitats, and how climate change is impacting their ability to survive.
Bird Pictures & Facts - National Geographic
Birds are vertebrate animals adapted for flight. Many can also run, jump, swim, and dive. Some, like penguins, have lost the ability to fly but retained their wings. Birds are found worldwide...
107 Bird Facts to Make You Sing (2024) - FactRetriever
2016年8月20日 · Coloring our world with beauty, song, and intelligence, birds are a unique treasure. What exactly makes them so special? Learn fascinating and little-known bird trivia and history, including crazy facts, bird behavior, weird bird anatomy, and much more.
All About Birds - Birds, Cornell Lab of Ornithology
All About Birds is your free online guide to birds and bird watching. Explore in-depth species information, tips from the Lab’s experts, and inspirational v ...
Online bird guide, bird ID help, life history, bird sounds from …
Use our Bird Guide to identify birds, learn about the life history, listen to the sounds, and watch bird behavior on video--the most comprehensive guide to Nort
Birds or Class Aves – Description and Characteristics
2024年4月2日 · Birds are a group of warm-blooded, feathered vertebrates that lack teeth and lay hard-shelled eggs. They live in nearly every environment, from the polar regions to the tropics. Most birds fly, but there are also flightless birds, such as penguins and emus.
Birds: Facts, Characteristics, Types & Pictures - Animal Vivid
Birds are warm-blooded theropod vertebrates that comprise the class aves and are characterized by beaked jaws, lightweight skeletons, and feather-covered bodies. This animal class has body modifications that support flight in most species, including the respiratory and digestive systems.