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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.
Bird propose un service de micromobilité fiable au plus près des attentes de la ville et des usagers limitant le recours à la voiture.
eBird transforms your bird sightings into science and conservation. Plan trips, find birds, track your lists, explore range maps and bird migration—all free.
Plus grande banque de développement du monde, la BIRD propose des produits financiers et des conseils stratégiques pour aider les pays à réduire la pauvreté et étendre les bienfaits d’une croissance durable à l’ensemble de leur population.
10 juil. 2024 · 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. Learn more about birds in this article.
About Birds. 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...
Science and Innovation. The Cornell Lab is powered by science, technology, and millions of people around the globe—people like you. eBird Status and Trend Maps reveal how birds are faring across continental scales. Explore the map for Baltimore Oriole. Baltimore Oriole by Matthew Plante / Macaulay Library.
Birds of the World is a powerful resource that brings deep, scholarly content from four celebrated works of ornithology into a single platform where biologists and birders can find comprehensive life history information on birds. Every bird has a story. Discover them all with Birds of the World.
They range in size from the 5 cm (2 in) bee hummingbird to the 2.70 m (9 ft) ostrich. There are about ten thousand species of birds. More than half of these are passerines, or perching birds. Birds have wings. The wings develop differently in different species.
Visit our free online bird guide. And to learn more about the incredible feat that is bird migration, follow the paths of more than 450 species with our Bird Migration Explorer.
