Allpahuayo Antbird
The Allpahuayo antbird (''Percnostola arenarum'') is a species of bird in the family Thamnophilidae. It is endemic to northeastern Peru. Its natural habitat is subtropical or tropical dry forests. References Antbird, Allpahuayo Percnostola Taxonomy articles created by Polbot Birds described in 2001 {{Thamnophilidae-stub ...
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Bird
Birds are a group of warm-blooded vertebrates constituting the class Aves (), 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 live worldwide and range in size from the bee hummingbird to the ostrich. There are about ten thousand living species, more than half of which are passerine, or "perching" birds. Birds have whose development varies according to species; the only known groups without wings are the extinct moa and elephant birds. Wings, which are modified forelimbs, gave birds the ability to fly, although further evolution has led to the loss of flight in some birds, including ratites, penguins, and diverse endemic island species. The digestive and respiratory systems of birds are also uniquely adapted for flight. Some bird species of aquatic environments, particularly seabirds and some waterbirds, have further evolved for swimming. B ...
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