NPSpecies

Data Source: Maxon, 1935;Wiegand, 1999; Wiegand, 2001;

Data Source: Helen Hamilton

Data Source: Helen Hamilton

Park Species Detail: Wiegand, 2001: Documented in the survey area (from Sandy Hook, Maryland, to District of Columbia line) during 1999-2000 field surveys. Wiegand, 1999: Documented to occur in the gorge during this survey from Great Falls, Maryland, downriver to the District of Columbia line., Park Species Data Source: Maxon, 1935;Wiegand, 1999;Wiegand, 2001;