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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.
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...
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. As such, they act as an early warning system for the state of the planet as a whole.
6 sty 2018 · On this page you’ll find out all about birds, including how they evolved and what makes a bird a bird. Random bird fact: the world’s most common wild bird is the red-billed quelea. This sparrow-sized bird is found in Sub-Saharan Africa, where it forms flocks of over a million individuals.
Both backyard birders and ornithologists will find relevant tips about their favorite birds, all written by an experienced expert in the field.
Use our Bird Guide to identify birds, learn about the life history, listen to the sounds, and watch bird behavior on video--the most comprehensive guide to Nort.
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.
