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Western Fly Hatches |
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Common Name
(Latin Name) |
Size |
Recommended Fly
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Mar |
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Apr |
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May |
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June |
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July |
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Aug |
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Sept |
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Oct |
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Midge
(Chironomidae) |
16-26 |
Nymph |
Emerger |
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Adult |
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Western March Brown
( R. morrisoni)
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12-14 |
Nymph |
Emerger |
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Adult |
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Little Olive
(B. tricaudatus) |
16-20 |
Nymph |
Emerger |
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Dun |
Spinner |
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Brachycentrus
Caddis
(various) |
12-18 |
Nymph |
Emerger |
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Adult |
Spent Adult |
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Slate Gray Dun
(E. longimanus) |
12-14 |
Nymph |
Emerger |
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Dun |
Spinner |
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Pale Morning Dun
(E.infrequens
/inermis) |
14-18 |
Nymph |
Emerger |
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Dun |
Spinner |
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Salmon Fly
(P. californica) |
4-8 |
Nymph |
Adult |
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Rhyacophila Caddis
(various) |
12-16 |
Nymph |
Emerger |
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Adult |
Spent Adult |
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Western Green
Drake
(D. grandis) |
10-12 |
Nymph |
Emerger |
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Dun |
Spinner |
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Brown Drake
(E. simulans) |
8-10 |
Nymph |
Emerger |
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Dun |
Spinner |
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Small Western
Drake
(E. flavilinea) |
14-16 |
Nymph |
Emerger |
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Dun |
Spinner |
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Spotted Sedge
(H. occidentalis) |
14-16 |
Nymph |
Emerger |
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Adult |
Spent Adult |
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Slate Cream Dun
(E. albertae) |
14-18 |
Nymph |
Emerger |
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Dun |
Spinner |
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Western Red Quill
(H. elegantula) |
14-16 |
Nymph |
Emerger |
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Dun |
Spinner |
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Speckle Wing Quill
(C. coloradensis nigritus) |
14-16 |
Nymph |
Emerger |
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Dun |
Spinner |
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Western Gray Drake
(S. occidentalis) |
10-12 |
Nymph |
Emerger |
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Dun |
Spinner |
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Trico
(T. minutus) |
20-24 |
Nymph |
Emerger |
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Dun |
Spinner |
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Blue Winged Olive
(B. Parvus) |
18-22 |
Nymph |
Emerger |
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Dun |
Spinner |
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Mahogany Dun
(P. bicornuta) |
18-20 |
Nymph |
Emerger |
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Dun |
Spinner |
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Tiny BWO
(P. edmundsi) |
20-24 |
Nymph |
Emerger |
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Dun |
Spinner |
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