The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.
In 45 records from GBIF, adults of this species have mostly been collected during August (51%), July (33%), June (7%), and September (7%).
In 51 records from GBIF, this species has been collected at elevations ranging from 156 to 11201 ft, with an average (median) of 6726 ft.
Time of day: Evening