The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.
In 320 records from GBIF, adults of this genus have mostly been collected during July (28%), June (26%), August (24%), May (10%), and September (8%).
In 145 records from GBIF, this genus has been collected at elevations ranging from 26 to 8022 ft, with an average (median) of 2690 ft.
Substrate: Silt, weeds