The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.
In 111 records from GBIF, adults of this genus have mostly been collected during May (26%), June (25%), July (24%), April (14%), and August (8%).
In 35 records from GBIF, this genus has been collected at elevations ranging from 3 to 3873 ft, with an average (median) of 1181 ft.
Time of day: Dusk
Shelter type: Long, thin cases made of various debris. The case may be three times as long as the actual insect.