The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.
In 539 records from GBIF, adults of this genus have mostly been collected during June (26%), July (19%), May (18%), August (15%), September (8%), and April (6%).
In 164 records from GBIF, this genus has been collected at elevations ranging from 26 to 8301 ft, with an average (median) of 1240 ft.