Reference Terms
from Wikipedia, the free encyclopedia


Birds are bipedal, warm-blooded, oviparous vertebrates characterized primarily by feathers, forelimbs modified as wings, and hollow bones.

Birds range in size from the tiny hummingbirds to the huge Ostrich and Emu.

Note:   The above text is excerpted from the Wikipedia article "Bird", which has been released under the GNU Free Documentation License.
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