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Rugged River Outfitters \ Hatch Charts
Michigan Trout Stream Emergance Chart 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

Common Name Latin Name Group Emergence Dates* Emergence Times
Tiny Black Stonefly #16-20 Allocapnia granulata, Nemouridae Stonefly 1/1-4/30 noon-4pm
Early Black Stonefly #10-14 Taeniopteryx nivalis Stonefly 2/21-4/30 noon-4pm
Early Brown Stonefly #12, 14 Brachyptera fasciata Stonefly 3/15-5/10 1pm-7pm
Slate Wing Mahogony #16-18 (Little Red Quill) Paraleptophlebia adoptiva Mayfly 4/15-7/8 Peak: 5/1-14 10am-4pm
Blue-winged Olive #16-20 Baetis vagans Mayfly 4/15-8/24 Peak: 5/1-7 and 6/7-21 noon-3pm
Dark Hendrickson #12, 14 (Hendrickson, Red Quill) Ephemerella subvaria Mayfly 4/20-5/20 Peak: 5/1-14 10am-4pm
Little Black Caddis #16-18 Chimarra aterrima Caddisfly 4/20-7/31 Peak: 5/1-14 noon-10pm
Grannom Caddis #14-16 Brachycentrus americanus Caddisfly 4/20-7/31 2pm-dark
Borcher's Drake #12, 14 Leptophlebia cupida Mayfly 4/20-8/15 10am-4pm
Green Caddis #10-18 (Green Rock Worm) Rhyacophilidae fenestra Caddisfly 5/1-6/30 2pm-dark
Medium Bown Stonefly #8-14 Perlodidae lsogenus Stonefly 5/1-7/31 afternoons
Light Hendrickson #14, 16 Ephemerella rotunda Mayfly 5/3-6/20 noon-5pm
Giant Stonefly #2-8 (Salmonfly) Pteronarcys dorsata Stonefly 5/15-6/30 any time
Great Speckled Olive Mayfly #10-14 Siphloplecton basale Mayfly 5/15-7/15 Peak: 5/14-31 noon-5pm
True Hendrickson #14, 16 Ephemerella invaria Mayfly 5/15-7/20 Peak: 5/21-6/7 noon-5pm
Sulphur Dun Mayfly #16, 18 Ephemerella dorothea Mayfly 5/15-7/8 Peak: 6/7-30 noon-5pm
Blue-winged Olive #14, 16 Baetis spp. Mayfly 5/15-7/12 8pm-10pm
Tiny Blue-winged Olive #20, 22 Baetis cingulatus Mayfly 5/15-8/30 10am-9pm
Green Oak Worm #8-12 Lepidoptera sp. Terrestrial 5/15-7/10 Peak: 6/7-21 day
Little Yellow or Green Stonefly #14-18 Allloperla sp. Stonefly 5/15-10/30 afternoons
White Miller Caddis #14, 16 Nectopsyche Caddis 5/15-10/30 afternoons
March Brown #10, 12 Stenonema vicarium Mayfly 5/17-7/20 noon-4pm
Early Gray Drake #12, 14 Siphlonurus rapidus Mayfly 5/20-6/15 Peak 6/1-7 dark
Cinammon Caddis #14-20 Hydropsyche sp. Caddisfly 5/20-9/30 4pm-dark
Sand Drake Mayfly #12, 14 Stenonema fuscum Mayfly 5/20-7/20 Peak: 6/1-14 8pm-midnight
Quill Gordon #12, 14 Epeorus pleuralis Mayfly 5/24-7/12 1pm-4pm
Pale Evening Dun #16, 18 Ephemerella dorothea Mayfly 6/1-7/15 8pm-midnight
Brown Drake Mayfly #8-12 Ephemera simulans Mayfly 6/1-7/4 Peak: 6/1-14 8pm-midnight
Great Orange Sedge #8, 10 Phryganlidae ptilostomis Caddisfly 6/1-7/31 evenings
Beetles Coleoptera Terrestrial 6/1-9/30 day, evening
Midges #20-28 Diptera . 6/1-10/30 .
Light Cahill #12, 14 Stenonema sp. Mayfly 6/5-8/14 2pm-10pm
Giant Michigan Mayfly #4-8 (Hex, Michigan Caddis) Hexagenia limbata Mayfly 6/10-7/10 Peak: 6/21-7/7 10pm-4am
Late Gray Drake #10, 12 Sephlonurus alternatus Mayfly 6/10-7/26 Peak: 7/1-14 dark
Mahogany Dun Mayfly #10, 12 Isonychia sadleri Mayfly 6/15-7/30 Peak: 6/21-7/14 4pm-10pm
Golden Drake Mayfly #10, 12 Ephemera varia Mayfly 6/15-8/7 .
Leadwing Coachman #10, 12 Isonychia bicolor Mayfly 6/15-9/15 4pm-10pm
Ants #12-24 (Black and Cinammon) Hymenoptera: Formicidae Terrestrial 6/15-9/30 day, evening
Big Golden Stonefly #6, 8 Paragentina media Stonefly 6/21-8/7 .
Slate Winged Olive Mayfly #14, 18 Ephemerella lata Mayfly 6/21-8/14 .
Dark Slate Wing Olive Mayfly #18, 20 Ephemerella simplex Mayfly 6/21-9/30 .
Tiny Blue Winged Olive Mayfly #22, 24 Pseudocloen anoka Mayfly 6/21-9/30 .
Crickets Orthoptera sp. Terrestrial 7/1-10/15 any time
Grasshoppers #6-12 Orthoptera sp. Terrestrial 7/15-9/30 day
Tiny White-winged Black #22-26 (Trico) Tricorythodes stygiatus Mayfly 7/20-10/20 6am-10am
Small Slate Mahogany Dun Mayfly #16, 18 Paraleptophlebia debilis Mayfly 7/20-10/30 .
Black Dancer Caddisfly #18, 20 Mystocides sepulchralis Caddisfly 8/1-9/30 .
Little Medium Olive Mayfly #22-24 Baetis pygmalus Mayfly 8/7-9/30 .
White Fly Mayfly #12, 14 Ephoron album Mayfly 8/14-9/30 .
Blue-winged Olive #14, 16 Baetis tricaudatus Mayfly 8/15-11/1 11am-4pm
Slate Wing Brown Mayfly #14, 16 Baetis heimalis Mayfly 9/1-11/1 .