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Hace 1 día · 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.
22 de jun. de 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.
21 de jun. de 2024 · Hummingbird, any of about 320 species of small, often brightly colored birds of the family Trochilidae, usually placed with the swifts in the order Apodiformes but sometimes separated in their own order, Trochiliformes.
25 de jun. de 2024 · One of Europe’s most common birds, the great tit, show an amazing adaptability to human-made habitats. There seem no limits for this species when it comes inventing new ways of acquiring food ...
9 de jun. de 2024 · peacock, any of three species of resplendent birds of the pheasant family, Phasianidae (order Galliformes). Strictly, the male is a peacock, and the female is a peahen; both are peafowl.
12 de jun. de 2024 · Certain air sacs have evolved in multiple lineages of soaring birds, and it emerges that these probably function to reduce the force required from the major flight muscles as they hold the wings...
7 de jun. de 2024 · Here we show that, in general, China’s national nature reserves can effectively protect about one-half of the bird and mammal populations within protected areas for long-term survival.
