New York Natural Heritage Program
Delaware River Clubtail
Gomphus septima delawarensis (Donnelly and Carle, 2000)
Insects

New York State Distribution [-]
It occurs only in the upper Delaware River along the New York/Pennsylvania border between Callicoon and Pond Eddy, a stretch of about 60 km. In the mid 1990s two adults were observed northward at the Pepacton Reservoir on the East Branch of the Delaware in Delaware County, but the East and West branches of the river above Hancock do not appear to support a breeding population. 

Global Distribution [-]
The overall distribution of both subspecies is highly disjunct. Gomphus s. septima, known only from Alabama, North and South Carolina, was first discovered in the 1930s. It was rediscovered in Alabama after a 20 year absence and is now known from approximately 16 rivers, most in the Piedmont of North Carolina, but also in Alabama (Krotzer 2002). The Delaware River endemic G.s. delawarensis was discovered in 1993; it occurs only in the upper Delaware River in New York, Pennsylvania and New Jersey from Mercer County New Jersey, north to the Pepacton Reservoir on the East Branch of the Delaware in Delaware County, a stretch of about 360 km.
Best Places to See
• Upper Delaware River (Sullivan County)