http://www.umass.edu/umext/snake/greens.html
http://www.rainforestsearch.com/rrrs/snk_rgs.htm#rg_snk
http://birch.incolsa.net/~drigg/roughg_.htm
http://members.home.net/loving/greenie.jpg
http://www.geocities.com/Heartland/Park/1627/greensnake.html
http://www.ednet.ns.ca/educ/museum/mnh/nature/snakes/green.htm
http://www.biosurvey.ou.edu/okwild/misc/smogrnsnak.html