References
Pattishall, Abigail.,
Cundall, David. 2009,
June. Habitat Use by
Synurbic Watersnakes (Nerodia
sipedon).
Herpetologica, vol. 65, issue 2, pp. 183-198.
Pattishall, Abigail., Cundall, David.
2008, December.
Spatial Biology of Northern Watersnakes (Nerodia
sipedon) Living along an Urban Stream.
Copeia, vol. 2008, issue 4, pp. 752-762.
Pattishall, Abigail., Cundall, David.
2008. Dynamic
changes in body form during swimming in the water snake
Nerodia sipedon.
Zoology, vol. 111, issue 1, pp. 48-61.
Marshall, John Clark Jr.
2008. Population
genetics and landscape modeling in water snakes.
Dissertation Abstracts International, vol. 69, issue 9,
suppl. B, 96 p.
Roth, aTC., Greene, aBD., Taylor, CM.
2006, September.
Movement Patterns and Home Range Use of the Northern Watersnake (Nerodia
sipedon). Copeia,
vol. 2006, issue 3, pp. 544-551.
Minnesota DNR.
Last updated 2010.
Northern Water Snake.
Retrieved from
http://www.dnr.state.mn.us/snapshots/snakes_turtles/northernwatersnake.html.
Minnesota DNR.
Northern water snake range map [picture].
Retrieved from
http://www.dnr.state.mn.us/snapshots/snakes_turtles/northernwatersnake.html.
Sheldon, A.B.
Coiled banded water snake [photograph].
Retrieved from
http://dnr.wi.gov/org/land/er/biodiversity/index.asp?mode=photoview&Grp=49&SpecSpec=ARADB22060&PhotoNum=1021.
Beck, Virgil.
Bluegill [photograph].
Retrieved from http://dnr.wi.gov/fish/species/blgill.htm.
Nedrelo, Dan.
Leopard Frog [photograph].
Retrieved from
http://dnr.wi.gov/org/land/er/biodiversity/index.asp?mode=photoview&Grp=21&SpecSpec=AAABH01160&PhotoNum=1056.
Laubenstein, Karen.
Bald Eagle [photograph].
Retrieved from
http://dnr.wi.gov/org/land/er/wwap/explore/profiles.asp?mode=detail&Species=ABNKA10010.
Hollingsworth, John
and Karen. Gray Wolf
[photograph]. Retrieved from http://dnr.wi.gov/org/land/er/biodiversity/index.asp?mode=photoview&Grp=17&SpecSpec=AMAJA01030&PhotoNum=7624.
Durso, Andrew.
Young snake [photograph].
Retrieved from
http://www.discoverlife.org/mp/20q?search=Nerodia+sipedon.
Willson, JD.
Close up head shot [photograph].
Retrieved from
http://www.discoverlife.org/mp/20q?search=Nerodia+sipedon
Willson, JD.
Dark snake on rivers edge [photograph].
Retrieved from
http://www.discoverlife.org/mp/20q?search=Nerodia+sipedon
Gillilland, Merritt.
Obtained April 10, 2010.
Nerodia sipedon.
Retrieved from
http://animaldiversity.ummz.umich.edu/site/accounts/information/Nerodia_sipedon.htmh.
CaliforniaHerps.com.
Obtained April 8, 2010.
Nerodia sipedon –
Northern Water Snake.
Retrieved from
http://www.californiaherps.com/snakes/pages/n.sipedon.html.
OSSM Vertebrage
Zoology. Obtained April
13, 2010. Vertebrate
Zoology Lecture Notes.
Retrieved from http://www.ossm.edu/biology/reptilia.htm.
Cossel Jr, John.
Obtained April 15, 2010.
Family: Colubridae.
Retrieved from http://imnh.isu.edu/digitalatlas/bio/reptile/main/colfam.htm.