The Extra-striped Snaketail is known to occur in nine counties in eastern New York State, with no population estimates determined (New York Natural Heritage Program 2009). It has been recently observed in large rivers of eastern New York in low numbers compared to other Ophioigomphid species present in these waters. In one known location, on the Upper Delaware River near Port Jervis, the species seems to have suffered a decline in population (New York Natural Heritage Program 2009). In addition, there appear to be a number of threats to this species, as it is intolerant of pollution, and the species is narrowly distributed in New York State, with no known western New York populations (New York Natural Heritage Program 2009).

Recent observations of Extra-striped Snaketails have been made in the 1990s to present on the Upper Hudson River, Upper Delaware River, St. Regis River, Raquette River, and Moose River (Donnelly 2004, New York Natural Heritage 2009). In addition to the 1993 surveys by Ken Soltesz, Frank Carle searched the Port Jervis area without success in the 1980s and early-1990s (Soltesz 1994). Thus, it seems likely that the species is gone from this section of the river and has therefore suffered a decline in the vicinity of Port Jervis. There has been no estimate of population size for this species based on statewide occurrences. New location information on the Extra-striped Snaketail in New York may be reflective of heightened interest in surveying for this species rather than a population increase or a range expansion (Holst 2005).

Several historical records are known from the Delaware River in the vicinity of Port Jervis (1 from New York, 1 from New Jersey, 2 from Pennsylvania), all from the 1920-1951 time period. These specimens were all the result of casual collecting. The full extent and size of the populations have not been determined; thus, long-term trends are unclear.