The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.
In 15 records from GBIF, adults of this genus have been collected during July (20%), September (20%), April (20%), August (13%), June (13%), May (7%), and March (7%).
In 119 records from GBIF, this genus has been collected at elevations ranging from 740 to 11401 ft, with an average (median) of 4938 ft.