The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.
In 181 records from GBIF, adults of this genus have mostly been collected during June (17%), July (17%), August (16%), May (14%), September (11%), and March (6%).
In 63 records from GBIF, this genus has been collected at elevations ranging from 10 to 8196 ft, with an average (median) of 3133 ft.