The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.
In 799 records from GBIF, adults of this family have mostly been collected during June (29%), July (25%), May (15%), August (14%), April (7%), and September (5%).
In 255 records from GBIF, this family has been collected at elevations ranging from 3 to 20669 ft, with an average (median) of 1881 ft.