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Old 10-26-2010, 11:10 PM
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Sammy-Umbrella Too-rescued, Dexter-CAG-rehomed handicapped, Sterling-CAG-rehomed retired breeder. Sunshine-12 yo CAG-adopted
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Thumbs up Avian Respiratory System

This is an excellent and informative article.
How the Respiratory System of Birds Works
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Aussie Ben (10-26-2010), Beilana (10-26-2010), Pheonix Rising (10-27-2010), Spiritbird (10-27-2010)