This is by no means a comprehensive list of all aquatic insects found in Western trout streams, instead we have highlighted those hatches that are most important to us as fly fishers. Below each chart you will find information about each insect and the most effective patterns to imitate them.

Western Hatch Charts

Mayflies of the West

Little Blue Winged Olive

Blue-winged-olive.jpg
Baetis spp

Time of Year

Feb-Nov

Hatch Time

Morning and Evening

Pale Morning Dun

pale-morning-dun.jpg
Ephemerella dorthea

Time of Year

April-October

Hatch Time

Late morning-early afternoon

Western Green Drake

western-green-drake.jpg
Drunella spp.

Time of Year

May-July

Hatch Time

Late-morning or afternoon

Trico

trico.jpg
Tricorythodes

Time of Year

June-Sept

Hatch Time

Morning

Speckled Dun

Speckled-dun.jpg
Callibaetis spp.

Time of Year

June-Sept

Hatch Time

Afternoon-Dusk

Caddisflies of the West

Coming Soon!

Subscribe
  • Twitter