The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.
In 188 records from GBIF, adults of this genus have mostly been collected during September (15%), August (13%), July (13%), May (12%), October (12%), June (11%), and April (7%).
In 16 records from GBIF, this genus has been collected at elevations ranging from 246 to 12303 ft, with an average (median) of 883 ft.