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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.
- Banco Internacional para Reconstrução e Desenvolvimento
O Banco Internacional para Reconstrução e Desenvolvimento...
- Aves – Wikipédia, a enciclopédia livre
Ordens. ver texto. Aves são uma classe de seres vivos...
- List of birds - Wikipedia
This article lists living orders and families of birds. The...
- Origin of birds - Wikipedia
The scientific question of within which larger group of...
- List of birds by common name - Wikipedia
In this list of birds by common name, a total of 10,976...
- Bird - Simple English Wikipedia, the free encyclopedia
Birds (Aves) are a group of animals with backbones. They...
- Banco Internacional para Reconstrução e Desenvolvimento
