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Northern Water Snake (Nerodia s. sipedon) MD: Anne Arundel Co. Smithsonian Environmental Research Center (38053’24.81”N” 7603’27.04”W”)

Tupper, Todd A. ; Aguilar, Robert ; Ferrara, Alyssa ; Hay, Coline. (2015). Northern Water Snake (Nerodia s. sipedon) MD: Anne Arundel Co. Smithsonian Environmental Research Center (38053’24.81”N” 7603’27.04”W”) . Catesbeiana, 35 (1) , 36-37.