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| | frigate bird -- Encyclopædia Britannica (Site not responding. Last check: 2007-11-07) |
 | | Frigate birds are about the size of a hen and have extremely long, slender wings, the span of which may reach to about 2.3 m (nearly 8 feet), and a long, deeply forked tail. |
 | | Most important in such interactions are the organism, or signal sender, and the third party, or signal receiver; also important are illumination and the relationship between the organism and its background. |
 | | Pelecaniform birds occur all over the world except in parts of the interior of North America, Africa, Asia, and Australia, in the high Arctic, and in most of Antarctica. |
| www.britannica.com /eb/article-9035443?tocId=9035443 (852 words) |
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