"National Feral Swine Mapping System" http://128.192.20.53/nfsms/
Bartelt, Amber. "Feral Pig." Texas Invasives. Texas Invasive Plant and Pest Council, 12 Sept. 2011. Web. 20 Mar. 2014. <http://www.texasinvasives.org/animal_database/detail.php?symbol=1>.
"Feral Hog Control." Missouri's Fish, Forests and Wildlife-Feral Hog Control. Missouri Department of Conservation, n.d. Web. 20 Mar. 2014. <http://mdc.mo.gov/your-property/problem-plants-and-animals/invasive-animals/feral-hog-control>.
"Feral Hogs." Nuisance Wildlife in Texas. Texas Parks and Wildlife Department, n.d. Web. 18 Mar. 2014. <http://www.tpwd.state.tx.us/huntwild/wild/nuisance/feral_hogs/>.
Feral Pig Control. Publication. Wisconsin Department of Natural Resources, 19 Sept. 2013. Web. 20 Mar. 2014. <http://dnr.wi.gov/topic/hunt/feralpig.html>.
Olivas, George M., and Luis A. Cendan. "The Swine Invasion: The Effects of Feral Hogs on Foreign Ecosystems." Vertebrate Journal. Wordpress, n.d. Web. 20 Mar. 2014. <http://www.vertebratejournal.org/1054/the-swine-invasion-the-effects-of-feral-hogs-on-ecosystems/>.
Taylor, Rick. "The Feral Hog in Texas." Wild Pig Info - Feral Hog Control and Management. Texas Parks and Wildlife Department, n.d. Web. 20 Mar. 2014. <http://wildpiginfo.msstate.edu/>.
"Wild Boar (Sus Scrofa)." Invasive Species: Animals - Wild Boar (Sus Scrofa). United States Department of Agriculture, 15 Feb. 2014. Web. 20 Mar. 2014. <http://www.invasivespeciesinfo.gov/animals/wildboar.shtml>.
"Wild Pigs." National Parks Service. U.S. Department of the Interior, 08 Mar. 2014. Web. 20 Mar. 2014. <http://www.nps.gov/pinn/naturescience/wildpigs.htm>.
"Hunting Feral Pigs." Mississippi State University. 27 June 2013. Web. 22 March 2014.
<http://wildpiginfo.msstate.edu/hunting-wild-pigs.html>.
"Control Techniques for Feral Hogs." Texas Natural Wildlife. April 29, 2014. Web. March 2014. <https://agrilife.org/texnatwildlife/feral-hogs/control-techniques-for-feral-hogs/>
"Plague of Wild pigs has U.S authorities squealing" http://www.reuters.com/article/2013/08/24/usa-pigs-idUSL2N0GO01Q20130824
Bartelt, Amber. "Feral Pig." Texas Invasives. Texas Invasive Plant and Pest Council, 12 Sept. 2011. Web. 20 Mar. 2014. <http://www.texasinvasives.org/animal_database/detail.php?symbol=1>.
"Feral Hog Control." Missouri's Fish, Forests and Wildlife-Feral Hog Control. Missouri Department of Conservation, n.d. Web. 20 Mar. 2014. <http://mdc.mo.gov/your-property/problem-plants-and-animals/invasive-animals/feral-hog-control>.
"Feral Hogs." Nuisance Wildlife in Texas. Texas Parks and Wildlife Department, n.d. Web. 18 Mar. 2014. <http://www.tpwd.state.tx.us/huntwild/wild/nuisance/feral_hogs/>.
Feral Pig Control. Publication. Wisconsin Department of Natural Resources, 19 Sept. 2013. Web. 20 Mar. 2014. <http://dnr.wi.gov/topic/hunt/feralpig.html>.
Olivas, George M., and Luis A. Cendan. "The Swine Invasion: The Effects of Feral Hogs on Foreign Ecosystems." Vertebrate Journal. Wordpress, n.d. Web. 20 Mar. 2014. <http://www.vertebratejournal.org/1054/the-swine-invasion-the-effects-of-feral-hogs-on-ecosystems/>.
Taylor, Rick. "The Feral Hog in Texas." Wild Pig Info - Feral Hog Control and Management. Texas Parks and Wildlife Department, n.d. Web. 20 Mar. 2014. <http://wildpiginfo.msstate.edu/>.
"Wild Boar (Sus Scrofa)." Invasive Species: Animals - Wild Boar (Sus Scrofa). United States Department of Agriculture, 15 Feb. 2014. Web. 20 Mar. 2014. <http://www.invasivespeciesinfo.gov/animals/wildboar.shtml>.
"Wild Pigs." National Parks Service. U.S. Department of the Interior, 08 Mar. 2014. Web. 20 Mar. 2014. <http://www.nps.gov/pinn/naturescience/wildpigs.htm>.
"Hunting Feral Pigs." Mississippi State University. 27 June 2013. Web. 22 March 2014.
<http://wildpiginfo.msstate.edu/hunting-wild-pigs.html>.
"Control Techniques for Feral Hogs." Texas Natural Wildlife. April 29, 2014. Web. March 2014. <https://agrilife.org/texnatwildlife/feral-hogs/control-techniques-for-feral-hogs/>
"Plague of Wild pigs has U.S authorities squealing" http://www.reuters.com/article/2013/08/24/usa-pigs-idUSL2N0GO01Q20130824