Caddis · Aquatic insect
Green Sedge (Rhyacophila)
Rhyacophila coloradensis
Size
8–12mm
Hook size
#14–12
Hatch window
Season June–AugustPeak time 16:00–dark
Water temperature
15° peak
11°20°
Hatches from 11°C, peaking at 15°C, tailing off by 20°C.How fish feed on it
Adult insects on the water are inefficient — a caddis skittering to lay eggs, a stonefly blundering about after crawling out, neither built for elegance. Trout treat it as an easy meal and a bit of theatre at once, chasing a moving fly with more enthusiasm than they'd ever give a still one. Movement is the tell; a static adult imitation often just sits there unloved.
Flies that imitate this
Elk Hair Caddis
Ecology
Where you'll find this
- North America — WestPresent
Present throughout