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Birds are a group of warm-blooded vertebrates constituting the class Aves ( / ˈeɪviːz / ), 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.
- Five Top Bird Characteristics
- Notable Types of Birds
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Certain identifying characteristics distinguish different types of birdsfrom other classes of animals. Five especially important distinguishing characteristics of birds include:
Today, there are more than 10,400 extant different types of bird species in the world. Across North America and South America, there are more than 4,400 species of the Aves class. Approximately 2,700 different species are found in Asia, and another 2,300 or so are found in Africa. More than 500 species are found in Europewest of the Ural Mountains,...
The evolution of birds has been a topic of much debate for many centuries. Today, the most commonly accepted theory, the theropod ancestor hypothesis, posits that birds evolved from theropod dinosaurs during the Jurassic period, which happened between 165 million and 150 million years ago. Theropod dinosaurs were two-legged dinosaurs, and the T. Re...
Learn about the class Aves, which includes more than 10,400 living bird species with feathers, wings, beaks, eggs and skeletons. Explore the diversity and evolution of birds, their behaviors, habitats and adaptations with photos and examples.
Explore the diversity and adaptability of birds with stunning photos, videos, and stories. Learn about their anatomy, evolution, behavior, and conservation.
Jun 22, 2024 · Learn about birds, the only living animals with feathers, from Britannica. Explore their evolution, diversity, behavior, ecology, and cultural significance.
Jul 13, 2021 · Learn about different types of birds from all around the world with this comprehensive guide. Find out interesting facts, see photos and click on any bird name to discover more about its features and behavior.
Browse the alphabetical list of birds found on Birdfact, a website that provides facts and photos of birds from around the world. Learn about the Acorn Woodpecker, the African Jacana, the Arctic Tern and more.
Learn about the incredible diversity and importance of birds, and how they are declining at a shocking rate. Explore popular and endangered species, data, stories and ways to help protect them.
