The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.
Time of year : Late April and early May
In 36 records from GBIF, adults of this species have mostly been collected during June (33%), May (31%), April (22%), and September (6%).
In 15 records from GBIF, this species has been collected at elevations ranging from 66 to 19029 ft, with an average (median) of 5367 ft.