Michigan Hatch Chart

This Hatch Chart is a list of when the major insect species for Michigan trout streams are expected to emerge. Please adjust the chart according to the river location.

Northern rivers Au Sable, Manistee Use Emergence Dates*
Mid-state rivers Muskegon, Pere Marquette Subtract 1-2 weeks
Tip of the Mitt rivers Sturgeon, Pigeon, Black Add 1-2 weeks
Upper Peninsula rivers Fox, Carp, Ontonagon Add 2-4 weeks

 

Fly Pattern Type Dates* Times
Tiny Black Stonefly #16-20 Stonefly 1/1-4/30 noon-4pm
Early Black Stonefly #10-14 Stonefly 2/21-4/30 noon-4pm
Early Brown Stonefly#10-14 Stonefly 3/15-5/10 1pm-7pm
Little Mahogany #16-18 Mayfly 4/15-7/8
Peak: 5/1-14
10am-4pm
Blue-winged Olive #16-20 Mayfly 4/15-10/24
Peak: 5/1-7 and 6/7-21
noon-3pm
Dark Hendrickson #12, 14 (Hendrickson, Red Quill) Mayfly 4/20-5/20
Peak: 5/1-14
10am-4pm
Little Black Caddis #16-20 Caddisfly 4/20-6/30
Peak: 5/1-14
noon-10pm
Great Mahogany¬†#10-14 (Borcher’s Drake)
Mayfly
4/20-6/15
10am-4pm
Grannom Caddis #12-16 Caddisfly 4/20-7/31 2pm-dark
Medium Brown Stonefly #6-10 Stonefly 5/1-6/30 afternoons
Yellow Sally #10, 12 Stonefly 5/1-6/30 afternoons
Green Caddis #10-16 (Green Rock Worm)
Caddisfly
5/1-7/31
2pm-dark
Spotted Sedge #12-16
Caddisfly
5/1-9/30
noon-dark
Little Sulphur #16, 18 (PMD)
Mayfly
5/15-6/7
evening
Golden Stonefly #4, 6 Stonefly 5/15-6/30 any time
Giant Stonefly #2-8 (Salmonfly) Stonefly 5/15-6/30 any time
Sulphur Dun Mayfly #12-16 (Pale Evening Dun, Light Hendrickson, Yellow Drake)
Mayfly
5/15-7/8
Peak: 6/7-30
noon-5pm
Green Oak Worm #8-12
Terrestrial
5/15-7/10
Peak: 6/7-21
day
Great Speckled Olive Mayfly #8-12 Mayfly 5/15-7/15
Peak: 5/14-31
noon-5pm
March Brown #8-12 Mayfly 5/15-7/20 noon-4pm
Tiny Blue-winged Olive #20, 22 Mayfly 5/15-8/30 10am-9pm
Light Cahill #10, 12
Mayfly 6/5-8/14
2pm-10pm
Isonychia #8, 10 (White Gloved Howdy, Lead-winged Coachman, Slate Drake, Mahogany Dun ) Mayfly 5/15-9/30 evenings
Gray Drake #8, 10 Mayfly 5/20-7/15
Peak 6/1-7
dark
Cinammon Caddis #14-18 Caddisfly 5/20-9/30 4pm-dark
Quill Gordon #12, 14 Mayfly 5/24-7/12 1pm-4pm
Pale Evening Dun #16, 18 Mayfly 6/1-7/15 8pm-midnight
Brown Drake Mayfly #8-10 Mayfly 6/1-7/4
Peak: 6/1-14
8pm-midnight
Great Orange Sedge #8, 10 Caddisfly 6/1-7/31 evenings
Beetles Terrestrial 6/1-9/30 day, evening
Midge #20-28 (Griffith’s Gnat) Chironomidae 6/1-10/30
Giant Michigan Mayfly #4-8 (Hex, Michigan Caddis) Mayfly 6/10-7/10
Peak: 6/21-7/7
10pm-4am
Hebe #16, 18 (Little Yellow Quill, Sulphur)  Mayfly 6/15-9/30
Peak: 7/1-7/31
noon-evening
Ants #12-24 (Black and Cinammon) Terrestrial 6/15-9/30 day, evening
Big Golden Stonefly #6, 8 Stonefly 6/21-8/7
Slate Winged Olive #14-18 (Summer Olive) Mayfly 6/21-8/14
White Miller Caddis #12-16
Caddisfly 7/1-9/30 afternoons
Crickets Terrestrial 7/1-10/15 any time
Golden Dun #10-14 (Apricot Cahill)
Mayfly
7/11-9/15
noon-evening
Grasshoppers #6-12 Terrestrial 7/15-9/30 day
Trico #22-26 Mayfly 7/20-10/20 6am-10am
October Caddis #8-10 (Autumn Sedge) Caddisfly 7/20-01/30 evening, morning
White Fly #10-14 Mayfly 8/14-9/30 evening, night

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