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Why do California condors have bald heads?

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  • "Birds: California Condor." San Diego Zoo. 2008. (Dec. 23, 2008) http://www.sandiegozoo.org/animalbytes/t-condor.html
  • "California Condors." National Park Service. Dec. 10, 2008. (Dec. 23, 2008) http://www.nps.gov/grca/naturescience/california-condors.htm
  • "California Condor Background and Recovery." Defenders of Wildlife. 2008. (Dec. 23, 2008) http://www.defenders.org/programs_and_policy/wildlife_conservation/imperiled_species/california_condor/background_and_recovery.php
  • "California Condor: Gymnogyps californianus." Audubon. 2008. (Dec. 23, 2008) http://audubon2.org/watchlist/viewSpecies.jsp?id=56
  • "California Condor Recovery." Arizona Game and Fish Department. 2008. (Dec. 23, 2008) http://www.azgfd.gov/w_c/california_condor.shtml
  • "Condor Facts." Oregon Zoo. 2008. (Dec. 23, 2008) http://www.oregonzoo.org/Condors/facts.htm
  • "Milestones in California Condor Conservation." Conservation and Research for Endangered Species (CRES). Dec. 2008. (Dec. 23, 2008) http://cres.sandiegozoo.org/projects/sp_condors_milestones.html
  • Ritter, John. "Lead poisoning eyed as threat to California condor." USA Today. Oct. 23, 2006. (Dec. 23, 2008) http://www.usatoday.com/news/nation/2006-10-23-condor_x.htm

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