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 |