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Birds are a group of warm-blooded vertebrates constituting the class Aves (/ ˈ eɪ v iː z /), 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.
eBird transforms your bird sightings into science and conservation. Plan trips, find birds, track your lists, explore range maps and bird migration—all free.
16 de jun. de 2021 · 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 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.
26 de mar. de 2015 · In this video we’re going to learn about the birds. They are so diverse, and there are so many colors and shapes, it's fun to learn about them. For example, this tiny little hummingbird doesn ...
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We believe birds are a gateway to caring for the natural world. Help us spark curiosity and foster learning, starting with the earliest ages, through the college years, and lasting a lifetime. Our work aims to inspire and equip the next generation of science and conservation leaders.
19 de may. de 2022 · Guía de Aves. Explore más de 800 especies de aves de América del Norte, aprenda sobre sus vidas y hábitats, y cómo el cambio climático está afectando su capacidad para sobrevivir. ¡Nuevo!
