Invasives

http://www.invasivespecies.gov

http://www.conservation.state.mo.us/nathis/exotic/vegman/six.htm

http://www.state.me.us/doc/nrimc/mnap/factsheets/invasivesfacts/lonicera.pdf

http://www.paflora.org/Ligustrum%20obtusifolium.pdf

http://www.dnr.state.mn.us/herbaceousplants/bullthistle.html

http://weeds.montanan.edu/crop/brome.htm

http://www.state.me.us/doc/nrimc/mnap/factsheets/invasivesfacts/rcathartica.pdf

http://www.hear.org/pier/ligsp.htm

http://projects.juniata.edu/ess300/Invasives/fieldguide.html

http://www.dnr.state.wi.us/org/land/er/invasive/info/damesrocket.htm

http://webapps.lib.uconn.edu/ipane/browsing.dfm?descriptionid=41

http://www.nps.gov/plants/alien/fact/akqu1.htm

http://www.state.me.us/doc/nrimc/mnap/factsheets/invasivesfacts/rcathartica.pdf

http://www.uwgb.edu/biodiversity/herbarium/invasive_species/aegpod01.htm

http://www.state.me.us/doc/nrimc/mnap/factsheets/invasivesfacts/bthunbergii.pdf

http://www.state.me.us/doc/nrimc/mnap/factsheets/invasivesfacts/Ljaponica.pdf

http://www.ansci.cornell.edu/plants/jimsonweed/jimsonweed.html

http://www.state.me.us/doc/nrimc/mnap/factsheets/invasivesfacts/Rficaria.pdf

http://www.nps.gov/plants/alien/fact/canu1.htm

http://www.conservation.state.mo.us/nathis/exotic/vegman/twentyon.htm

http://www.dnr.state.oh.us/dnap/invasive/6canarygrass.htm

http://www.nps.gov/plants/alien/fact/elan1.htm

http://pi.cdfa/ca/gov/weedinfo/SORGHUM2.html

http://www.inhs.uiuc.edu/chf/outreach/VMG/sibelm.html

http://www.inhs.uiuc.edu/chf/outreach/VMG/parsnip.html

http://www.nps.gov/plants/alien/fact/ruph1.htm

http://www.agriculture.state.pa.us/plantindustry/cwp/view.asp?A=3&QUESTION_ID=121152

http://plants.usda.gov/

Protected Species

The Pennsylvania Fish and Boat Commission

The Pennsylvania Game Commission

The Pennsylvania Department of Conservation and Natural Resources

U.S. Fish & Wildlife Service: Endangered Species Act

U.S. Fish & Wildlife Service: Endangered Species Program

World Wildlife Fund

National Wildlife Federation

National Wildlife Federation: Backyard Wildlife Habitat

Peterson, Roger Tory. Peterson Field Guide: Birds of Eastern and Central North America, Fifth Edition. Houghton Mifflin Company: Boston, 2002.

Johndgard, Paul A. Hawks, Eagles, & Falcons of North America. 2001. Chanticleer Press,Inc. New York.

Farrand, John. An Audubon Handbook: Eastern Birds. 1988. Chaticleer Press, Inc. New York.

Elbroch, Mark and Eleanor Marks. Bird Tracks & Sign: A Guide to North American Species. 2001. Stackpole Books, Mechanicsburg.

Elbroch, Mark and Eleanor Marks. Mammal Tracks & Sign: A Guide to North American Species. 2001. Stackpole Books, Mechanicsburg.

Merritt, Joseph F. Mammals of Pennsylvania. 1987. University of Pittsburgh Press, Pittsburgh.

Schwartz, Charles, and Elizabeth Schwartz. The Wild Mammals of Missouri. University of Missouri Press, Columbia: 1959

Birding

http://pa.audubon.org

http://www.dcnr.state.pa.us/

Natural Heritage Inventory

NatureServe

Western Pennsylvania Conservancy