The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.
In 192 records from GBIF, adults of this genus have mostly been collected during June (16%), August (16%), May (16%), July (16%), September (15%), April (10%), and October (6%).
In 6 records from GBIF, this genus has been collected at elevations ranging from 492 to 820 ft, with an average (median) of 522 ft.