Northeastern Hatch Chart for Some Important Species:
The sizes shown are those that you are apt to encounter in this region.
Also note that unusual weather conditions may cause these fly emergences to vary.
I. Mayflies:
a. Light Hendrickson-(E. Subvaria Female) End of April to end of May. #12 Hook
b. Dark Hendrickson-(E.Subvaria Male) End of April to end of May. #14 Hook
c. Eastern Sulphurs-(E. Invaria & Dorothea) Mid May to early July. #14, #16, #18, #20 Hook
d. Light Cahill-(Stenonema) Early June to early September. #12, #14 Hook
e. Blue Wing Olives- (Drunella & Baetis) April to December. #18, #20, #22, #24, #26 Hook
II. Caddis:
a. Green Pupa Pattern-(Imitates Grannom, Spotted Sedge and Various other Caddis). #14, #16, #18, #20
b. Olive Pupa Pattern-(Imitates Spotted Sedge, Little Sister Sedge and Various other Caddis).#14, #16, #18, #20
c. Tan Pupa Pattern-(Imitates Spotted Sedge, Summer/Winter Caddis and Various other Caddis). #16, #18, #20, #22
d. Dark Grey Adult-(Imitates Grannom, Blue Sedge, Summer/Winter Caddis and Various other Caddis). #16, #18, #20, #22
e. Olive Adult-(Imitates Spotted Sedge, Little Olive Sedge and Various other Caddis). #16, #18, #20, #22
f. Tan Adult-(Imitates Spotted Sedge.) #16, #18, #20
g. Dark Grey Diving Adult-(Imitates Grannom, Chimarra and Various other Caddis). #14, #16, #18
h. Green Diving Caddis-(Imitates Rhyacophila and other Various Caddis). #14, #16, #18
i. Tan Diving Caddis-(Imitates Spotted Sedge and other Various Caddis). #14, #16, #18
III. Midges:
a. Midge Worm- Red, Black and Grey- #20, #22, #24
b. Midge Emerger- Red, Black and Grey- #20, #22, #24, #26
c. Cluster Midge- Black- #18, #20, #22, #24
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