The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.
In 61 records from GBIF, adults of this genus have mostly been collected during September (34%), August (28%), October (23%), and July (8%).
In 21 records from GBIF, this genus has been collected at elevations ranging from 16 to 4117 ft, with an average (median) of 2592 ft.
Time of day: Evening; earlier when cooler
Diet: Leaves, algae