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| | Avian photography, bird photos, birds forum and online community |
 | | Birds are bipedal, warm-blooded, oviparous vertebrates characterized primarily by feathers, forelimbs modified as wings, and hollow bones. |
 | | Depending on taxonomic viewpoint, there are about 8,800—10,200 living bird species (plus about 120—130 that have become extinct in the span of human history) in the world, making them the most diverse class of terrestrial vertebrates. |
 | | Birds are a very differentiated class, with some feeding on nectar, plants, seeds, insects, rodents, fish, carrion, or other birds. |
| www.photobirds.com (340 words) |
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