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Bird. 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.
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 and...
Hace 5 días · 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.
Over the past 4 yrs, The Red-tailed Hawk Project has captured and sampled more than 400 hawks from 7 of the 16 described subspecies and deployed over 100 tracking units.
El Instituto Distrital de Turismo (IDT), pone al servicio de residentes y visitantes de la capital del país, dos nuevos observatorios para el avistamiento de aves, espacios para disfrutar de la gran riqueza natural que tiene la ciudad, ubicados en el humedal “El Burro” (suroccidente) y en el sendero peatonal de “Monserrate” (Oriente).
eBird transforms your bird sightings into science and conservation. Plan trips, find birds, track your lists, explore range maps and bird migration—all free.
Despite their importance, birds are declining at a shocking rate. One in eight birds species is now threatened with extinction. But by learning about birds, we can begin to tackle the environmental crisis. Birds are found all over the world and are one of the most well-studied groups of animals.
