The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.
In 454 records from GBIF, adults of this genus have mostly been collected during July (14%), August (13%), June (12%), September (12%), October (11%), April (10%), May (9%), March (6%), and November (6%).
In 11 records from GBIF, this genus has been collected at elevations ranging from 322 to 3688 ft, with an average (median) of 906 ft.