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 #12, 14 Stonefly 3/15-5/10 1pm-7pm
Slate Wing Mahogony #16-18 (Little Red Quill) Mayfly 4/15-7/8
Peak: 5/1-14
10am-4pm
Blue-winged Olive #16-20 Mayfly 4/15-8/24
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 #16-18 Caddisfly 4/20-7/31
Peak: 5/1-14
noon-10pm
Grannom Caddis #14-16 Caddisfly 4/20-7/31 2pm-dark
Borcher’s Drake #12, 14 Mayfly 4/20-8/15 10am-4pm
Green Caddis #10-18 (Green Rock Worm) Caddisfly 5/1-6/30 2pm-dark
Medium Bown Stonefly #8-14 Stonefly 5/1-7/31 afternoons
Light Hendrickson #14, 16 Mayfly 5/3-6/20 noon-5pm
Giant Stonefly #2-8 (Salmonfly) Stonefly 5/15-6/30 any time
Great Speckled Olive Mayfly #10-14 Mayfly 5/15-7/15
Peak: 5/14-31
noon-5pm
True Hendrickson #14, 16 Mayfly 5/15-7/20
Peak: 5/21-6/7
noon-5pm
Sulphur Dun Mayfly #16, 18 Mayfly 5/15-7/8
Peak: 6/7-30
noon-5pm
Blue-winged Olive #14, 16 Mayfly 5/15-7/12 8pm-10pm
Tiny Blue-winged Olive #20, 22 Mayfly 5/15-8/30 10am-9pm
Green Oak Worm #8-12 Terrestrial 5/15-7/10
Peak: 6/7-21
day
Little Yellow or Green Stonefly #14-18 Stonefly 5/15-10/30 afternoons
White Miller Caddis #14, 16 Caddis 5/15-10/30 afternoons
March Brown #10, 12 Mayfly 5/17-7/20 noon-4pm
Early Gray Drake #12, 14 Mayfly 5/20-6/15
Peak 6/1-7
dark
Cinammon Caddis #14-20 Caddisfly 5/20-9/30 4pm-dark
Sand Drake Mayfly #12, 14 Mayfly 5/20-7/20
Peak: 6/1-14
8pm-midnight
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 #8-12 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
Midges #20-28 . 6/1-10/30 .
Light Cahill #12, 14 Mayfly 6/5-8/14 2pm-10pm
Giant Michigan Mayfly #4-8 (Hex, Michigan Caddis) Mayfly 6/10-7/10
Peak: 6/21-7/7
10pm-4am
Late Gray Drake #10, 12 Mayfly 6/10-7/26
Peak: 7/1-14
dark
Mahogany Dun Mayfly #10, 12 Mayfly 6/15-7/30
Peak: 6/21-7/14
4pm-10pm
Golden Drake Mayfly #10, 12 Mayfly 6/15-8/7 .
Leadwing Coachman #10, 12 Mayfly 6/15-9/15 4pm-10pm
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 Mayfly #14, 18 Mayfly 6/21-8/14 .
Dark Slate Wing Olive Mayfly #18, 20 Mayfly 6/21-9/30 .
Tiny Blue Winged Olive Mayfly #22, 24 Mayfly 6/21-9/30 .
Crickets Terrestrial 7/1-10/15 any time
Grasshoppers #6-12 Terrestrial 7/15-9/30 day
Tiny White-winged Black #22-26 (Trico) Mayfly 7/20-10/20 6am-10am
Small Slate Mahogany Dun Mayfly #16, 18 Mayfly 7/20-10/30 .
Black Dancer Caddisfly #18, 20 Caddisfly 8/1-9/30 .
Little Medium Olive Mayfly #22-24 Mayfly 8/7-9/30 .
White Fly Mayfly #12, 14 Mayfly 8/14-9/30 .
Blue-winged Olive #14, 16 Mayfly 8/15-11/1 11am-4pm
Slate Wing Brown Mayfly #14, 16 Mayfly 9/1-11/1 .

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