Hatch Chart

Upper Peninsula of Michigan Insect Emergence Chart

 

This hatch chart contains information for major insect emergences of angling importance in Michigan's Upper Peninsula. The chart is interactive, meaning you can click on the common or scientific name of an insect to view a detailed description of the behavior, physical characteristics, and habitat of that insect as well as view photos of live samples and explore fly patterns used to imitate them.

 

For other areas of Michigan make the following corrections to emergence times: Tip-Of-The-Mitt - Subtract 1 Week

                                                                                                                                                 Northern Rivers - Subtract 2 Weeks

                                                                                                                                                 Mid-State Rivers - Subtract 3 Weeks

 

Common Name (Hook Size) Scientific Name Insect Group Emergence Dates* Emergence Times*
Tiny Black Stonefly (16-20)  Allocapnia granulata, Nemouridae sp. Stonefly  1/14 - 5/14 12:00 - 16:00 
Early Black Stonefly (10-14) Taeniopteryx nivalis  Stonefly  3/7 - 5/14 12:00 - 16:00
Early Brown Stonefly (12-14) Brachyptera fasciata  Stonefly  3/29 - 5/24 13:00 - 19:00 
Slate Wing Mahogany, Little Red Quill (16-18) Paraleptophlebia adoptiva  Mayfly

4/29 - 7/22  

Peak: 5/14 - 5/28 

 10:00 - 16:00
Blue-Winged Olive (16-20) Baetis tricaudatus (formerly, Baetis vagans)   Mayfly 

4/29 - 9/7

Peak: 5/15 - 5/21

& 6/21 - 7/5 

12:00 - 15:00 
Dark Hendrickson, Red Quill (12-14) Ephemerella subvaria  Mayfly 

 5/4 - 6/3  

Peak: 5/14 - 5/21

10:00 -16:00 
Little Black Caddis (16-18) Chimarra aterrima  Caddis

5/4 - 8/14

Peak: 5/14 - 5/21 

12:00 -22:00 
Grannom Caddis (14-16) Brachycentrus americanus  Caddis   5/4 -8/14 14:00 - Dark 
Borcher's Drake (12-14) Leptophlebia cupida  Mayfly   5/4 - 8/29 10:00 - 16:00 
Green Caddis, Green Rock Worm (10-18) Rhyacophilidae fenestra Caddis   5/14 - 7/14 14:00 - Dark 
Medium Brown Stonefly (8-14) Perlodidae isogenus  Stonefly   5/14 - 8/14 Afternoons 
Light Hendrickson (14-16) Ephemerella rotunda  Mayfly  5/17 - 7/4   12:00 - 17:00
Giant Stonefly, Salmonfly (2-8) Pternarcys dorsata  Stonefly  5/29 - 7/14  Anytime 
Great Speckled Olive Mayfly (10-14) Siphloplecton baslae  Mayfly 

5/29 - 7/29

Peak: 5/28 - 5/14 

 12:00 - 17:00

True Hendrickson (14-16)

Ephemerella invaria  Mayfly 

 5/29 - 8/3   

Peak: 6/4 - 6/21

12:00 - 17:00 
Sulphur Dun Mayfly (16-18) Ephemerella dorothea  Mayfly 

5/29 - 7/22

Peak: 6/21 - 7/14 

12:00 - 17:00 
Blue-Winged Olive (14-16) Baetis sp.  Mayfly   5/29 - 7/26 20:00 - 22:00 
Tiny Blue-Winged Olive (20-22) Baetis cingulatis  Mayfly   5/29 - 9/13 10:00 - 21:00 
Green Oak Worm (8-12) Lepidoptera sp. Terrestrial

5/29 - 7/24

Peak: 6/21 - 7/5 

Daytime 
Little Yellow or Green Stonefly (14-18)  Alloperla sp. Stonefly   5/29 - 11/13 Afternoons 
White Miller Caddis (14-16) Nectopsyche  Caddis   5/29 - 11/13 Afternoons 
March Brown (10-12) Stenonema vicarium  Mayfly  5/31 - 8/3  12:00 - 16:00 
Early Gray Drake (12-14) Siphlonurus rapidus  Mayfly 

6/3 - 6/29

Peak 6/14 - 6/21

Dark 
Cinnamon Caddis (14-20)   Hydropsyche sp. Caddis   6/3 - 10/14 16:00 - Dark 
Sand Drake Mayfly (12-14) Stenonema fuscum  Mayfly 

 6/3 - 8/3

Peak: 6/14 - 6/28

20:00 - 24:00 
Quill Gordon (12-14) Epeorus pleuralis  Mayfly  6/7 - 7/26  13:00 - 16:00 
Pale Evening Dun (16-18) Ephemerella dorothea  Mayfly   6/15 - 7/29 20:00 - 24:00 
Brown Drake Mayfly (8-12) Ephemera simulans  Mayfly 

6/15 - 7/18

Peak: 6/14 - 6/28 

20:00 - 24:00 
Great Orange Sedge (8-10) Phryganlidae ptilostomis  Caddis   6/15 - 8/14 Evenings 
Beetles Coleoptera   Terrestrial  6/15 - 10/14 Daytime & Evenings 
Midges (20-28) Diptera   Midges 6/15 - 11/13   Anytime
Light Cahill (12-14) Stenonema sp.  Mayfly   6/20 - 8/28 14:00 - 22:00 
Giant Michigan Mayfly (4-8)  Hexagenia limbata Mayfly 

6/24 - 7/24

Peak: 7/5 - 7/21

 22:00 - 04:00
Late Gray Drake (10-12) Sephlonurus alternatus  Mayfly 

6/24 - 8/9

Peak: 7/15 - 7/28 

Dark 
Mahogany Dun (10-12) Isonychia sadleri  Mayfly 

 6/29 - 8/13

Peak: 6/7 - 7/28

16:00 - 22:00 
Golden Drake (10-12) Ephemera varia  Mayfly   6/29 - 8/21  -
Leadwing Coachman (10-12) Isonychia bicolor  Mayfly   6/29 - 9/29  16:00 - 22:00
Ants - Black & Cinnamon (12-24) Hymenoptera: Formicidae  Terrestrial  6/29 - 10/14   Daytime & Evenings
Big Golden Stonefly (6-8) Paragentina media  Stonefly  7/5 - 8/21   -
Slate Winged Olive (14-18) Ephemerella lata  Mayfly   7/5 - 8/28  -
Dark Slate Wing Olive (18-20) Ephemerella simplex  Mayfly  7/5 - 10/14   -
Tiny Blue Winged Olive (22-24) Pseudocloen anoka  Mayfly  7/5 - 10/14   -

Crickets

Orthoptera sp.  Terrestrial 7/15 - 10/29  Anytime 
Grasshoppers (6-12) Orthoptera sp.  Terrestrial  7/29 - 10/14  Daytime 
Tiny White-Winged Black, Trico (22-26)  Tricorythodes stygiatus  Mayfly  8/3 - 11/3 06:00 - 10:00 
Small Slate Mahogany (16-18) Paraleptophlebia debilis  Mayfly  8/3 - 11/13   -
Black Dancer Caddisfly (18-20) Mystocides sepulchralis  Caddis  8/15 - 10/14   -
Little Medium Olive (22-24) Baetis brunneicolor (formerly, Baetis pygmalus)  Mayfly  8/21 - 10/14   -
White Fly (12-14) Ephoron album, Ephoron leukon  Mayfly  8/28 - 10/14   -
Blue-Winged Olive (14-16) Baetis tricaudatus  Mayfly  8/29 - 11/15   11:00 - 16:00
Slate Wing Brown Mayfly (14-16) Baetis heimalis  Mayfly  9/15 - 11/15   -

Source: Michigan Hatch Chart. Trails to Trout. [accessed 2017 Oct 9]. http://www.trailstotrout.com/mihatch.html

*Note: Emergence dates and times are approximate; actual dates and times may vary.

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