The main article for this category
Birds are bipedal, warm-blooded, egg-laying vertebrates characterized primarily by feathers, forelimbs modified as wings, and hollow bones. This category contains taxa at the order or higher level in the class of Aves.
For individual species of birds, see the subcategories, particularly category:Birds by classification and category:Birds by country.
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This category has the following 33 subcategories, out of 33 total.
Pages in category "Birds"
The following 40 pages are in this category, out of 40 total. This list may not reflect recent changes (learn more).