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The Evolution of the Conservation Movement, 1850-1920History.(n.d.). History. Retrieved April 30, 2014, from http://www.loc.gov/teachers/classroommaterials/connections/conservation/history.html
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Gerken, J. (2013, December 2). Elephant Poaching Could Wipe Out 20 Percent Of African Population In Next Decade, Report Shows. The Huffington Post. Retrieved May 6, 2014, from http://www.huffingtonpost.com/2013/12/02/africas-elephants-threat_n_4371108.html
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Total number of known threatened species: 16,938. (n.d.).Endangered Species International. Retrieved May 14, 2014, from http://www.endangeredspeciesinternational.org/overview2.html
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Urban Wildlife Institute.(n.d.).Lincoln Park Zoo. Retrieved May 16, 2014, from http://www.lpzoo.org/conservation-science/science-centers/urban-wildlife-institute
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The History of Wildlife Conservation and Research in the United States – and Implications for the Future.(n.d.). . Retrieved April 29, 2014, from http://cnr.ncsu.edu/fer/directory/documents/ArticleHistoryofWildlifeResearch.pdf
The Value of Wildlife.(n.d.). . Retrieved April 29, 2014, from http://www.uesc.br/cursos/pos_graduacao/mestrado/animal/artigo_chandonet.pdf
10 Recently Extinct Animals - Listverse.(n.d.).Listverse. Retrieved April 30, 2014, from http://listverse.com/2009/07/25/10-recently-extinct-animals/
States. National Park Service. (2014, April 7). Theodore Roosevelt and Conservation. National Parks Service. Retrieved April 30, 2014, from http://www.nps.gov/thro/historyculture/theodore-roosevelt-and-conservation.htm
The Evolution of the Conservation Movement, 1850-1920History.(n.d.). History. Retrieved April 30, 2014, from http://www.loc.gov/teachers/classroommaterials/connections/conservation/history.html
States. National Park Service. (2014, April 7). Theodore Roosevelt and Conservation. National Parks Service. Retrieved April 30, 2014, from http://www.nps.gov/thro/historyculture/theodore-roosevelt-and-conservation.htm
Parry, W. (2012, July 22). Many Countries Failing to Prevent Illegal Wildlife Trade: WWF Report. LiveScience. Retrieved May 1, 2014, from http://www.livescience.com/21750-illegal-wildlife-trade-report-card.html
Why it is Important to Save Wildlife?.(n.d.). Envirocivilcom. Retrieved May 5, 2014, from http://envirocivil.com/environment/why-it-is-important-to-save-wildlife/
Unit Eight: Wildlife Conservation - Man In Nature. (n.d.). . Retrieved May 6, 2014, from http://www.maninnature.com/School/Discover/DW8.pdf
Wildlife and the Maasai | Cultural Survival.(n.d.).Wildlife and the Maasai | Cultural Survival. Retrieved May 6, 2014, from http://www.culturalsurvival.org/ourpublications/csq/article/wildlife-and-maasai
Gerken, J. (2013, December 2). Elephant Poaching Could Wipe Out 20 Percent Of African Population In Next Decade, Report Shows. The Huffington Post. Retrieved May 6, 2014, from http://www.huffingtonpost.com/2013/12/02/africas-elephants-threat_n_4371108.html
Record number of rhinos poached in 2013. (n.d.).MNN. Retrieved May 9, 2014, from http://www.mnn.com/earth-matters/animals/blogs/record-number-of-rhinos-poached-in-2013
. (n.d.).WorldWildlife.org. Retrieved May 9, 2014, from http://worldwildlife.org/species/tiger
Carrington, D. (2013, November 15). Amazon deforestation increased by one-third in past year.theguardian.com. Retrieved May 9, 2014, from http://www.theguardian.com/environment/2013/nov/15/amazon-deforestation-increased-one-third
Amazon Wildlife. (n.d.). Mongabay.com. Retrieved May 9, 2014, from http://rainforests.mongabay.com/amazon/amazon_wildlife.html
Effects on Wildlife and Habitat - National Wildlife Federation.(n.d.).Effects on Wildlife and Habitat - National Wildlife Federation. Retrieved May 13, 2014, from http://www.nwf.org/wildlife/threats-to-wildlife/global-warming/effects-on-wildlife-and-habitat.aspx
Zimmer, C. (2011, August 29). How Many Species? A Study Says 8.7 Million, but It's Tricky. The New York Times. Retrieved May 14, 2014, from http://www.nytimes.com/2011/08/30/science/30species.html?_r=0
Endangered Species Statistics.(n.d.).Statistic Brain RSS. Retrieved May 14, 2014, from http://www.statisticbrain.com/endangered-species-statistics/
Total number of known threatened species: 16,938. (n.d.).Endangered Species International. Retrieved May 14, 2014, from http://www.endangeredspeciesinternational.org/overview2.html
About the San Diego Zoo.(n.d.).San Diego Zoo. Retrieved May 16, 2014, from http://zoo.sandiegozoo.org/content/about-san-diego-zoo
States.National Park Service. (2014, May 7). Wolves in Yellowstone.National Parks Service. Retrieved May 16, 2014, from http://www.nps.gov/yell/naturescience/wolves.htm
Urban Wildlife Institute.(n.d.).Lincoln Park Zoo. Retrieved May 16, 2014, from http://www.lpzoo.org/conservation-science/science-centers/urban-wildlife-institute
Lincoln Park Zoo to trim $1 million from budget, cut staff. (2009, January 15). Chicago Tribune. Retrieved May 18, 2014, from http://articles.chicagotribune.com/2009-01-15/news/0901140622_1_world-class-zoo-lincoln-park-zoo-zoo-operations
Brookfield-Zoo-lays-off-11-workers,-will-close - Chicago Sun-Times. (n.d.). Brookfield-Zoo-lays-off-11-workers,-will-close - Chicago Sun-Times. Retrieved May 18, 2014, from http://www.suntimes.com/news/metro/2832865-418/society-brookfield-zoo-cuts-reductions.html#.U3j23NoU_Mx