The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.
Time of year : March and April
In 70 records from GBIF, adults of this species have mostly been collected during June (31%), May (23%), April (13%), July (13%), March (9%), and September (6%).
In 27 records from GBIF, this species has been collected at elevations ranging from 560 to 5103 ft, with an average (median) of 2161 ft.