Number of Occurrences
Note: For many non-migratory species, occurrences are roughly equivalent to populations.
Estimated Number of Occurrences: 21 - 300
Comments: Maryland (9), New York (31), Vermont (9), West Virginia (19), Quebec (9), Maine (1), Pennsylvania (1). There is one population in New Brunswick, CA; this occurrence was rediscovered from the 1800s.