Michigan Hatch Chart

What do Hexagenia limbata, Ephemerella dorothea, and Isonychia sadleri all have in common?  They are all BUGS!  Fly fishing is all about putting an imitation of a natural food source in the face of a fish, and many times that means insects.  The following hatch chart helps you make sense of the funny scientific names associated with the insects we try so hard to imitate.  Common names, usual seasons and peak emergences are all included for your reference. Highlighted rows indicate major hatches. Peak hatch periods are indicated in red.

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Size Common Name
Scientific Name
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
18/20 Tiny Early Winter Black Stonefly
Allocapnia granulata OR vivipara
                 
16/20 Tiny Late Winter Black Stonefly
Nemouridae & Leuctridae
                 
10/14 Early Black Stonefly
Taeniopteryx nivalis
                 
12/14 Early Brown Stonefly
Brachyptera fasciata
                 
18/20 Blue Wing Olive Mayfly
Baetis vagans
             
16/18 Slate Wing Mahogany Mayfly
Paraleptophlebia adoptiva
                 
12/14 Dark Hendrickson Mayfly
Ephemerella subvaria
                   
16/18 Little Black Caddis
Chimarra aterrima
             
12/14 Borcher's Drake Mayfly
Leptophlebia cupida
             
14/16 Grannon Caddis
Brachycentrus americanus
               
2/8 Midwestern Salmon Fly Stonefly
Pteronarcys dorsata
               
10/18 Green Rock Worm Caddis
Rhyacophilidae fenestra
                   
8/14 Medium Brown Stonefly
Perlodidae isogenus & isoperla
                 
10/14 Great Speckled Olive Mayfly
Siphloplecton basale
                 
14/20 Net Building Caddis
Hydropsche bronta & simulans
           
16/18 Sulphur Dun Mayfly
Ephemerella dorothea
                 
14/18 Little Yellow & Little Green Stonefly
Alloperla caudata & imbecilla
           
14/16 White Miller Caddis
Nectopsyche
           
20/22 Blue Wing Olive Mayfly
Baetis cingulatus
               
14/16 True Hendrickson Mayfly
Ephemerella invaria
                 
14/16 Light Hendrickson Mayfly
Ephemerella rotunda
                   
10/12 American March Brown Mayfly
Stenonema vicarium
                 
12/14 Sand Drake Mayfly
Stenonema fuscum
                 
12/14 Early Gray Drake Mayfly
Siphlonurus rapidus
                   
10/12 Brown Drake Mayfly
Ephemera simulans
                 
8/10 Great Orange Sedge Caddis
Phryganlidae ptilostomis
                   
8/12 Green Oak Worm | Greenie Worm Caterpillar
Various
                   
20/28 Midges
Diptera
             
10/12 Mahogany Dun Mayfly
Isonychia sadleri
                   
6/8 Great Olive Winged Drake Mayfly
Hexagenia limbata
                   
10/12 White Gloved Howdy Mayfly
Isonycha bicolor
               
12/14 Light Cahill Mayfly
Stenonema canadense
                 
10/12 Late Gray Drake Mayfly
Sephlonurus alternatus
                   
10/12 Golden Drake Mayfly
Ephemera varia
                 
6/8 Big Golden Stonefly
Paragentina media
                 
14/18 Slate Winged Olive Mayfly
Ephemerella lata
                 
22/24 Tiny Blue Winged Olive Mayfly
Pseudocloen anoka
               
18/20 Dark Slate Wing Olive Mayfly
Ephemerella simplex
               
8/24 Terrestrials
Ants/Grasshoppers/Beetles/Jasids
             
24/26 Tiny White Wing Black Mayfly
Tricorythodes stygiatus
               
16/18 Small Slate Mahogany Dun Mayfly
Paraleptophlebia debilis
               
18/20 Black Dancer Caddisfly
Mystocides sepulchralis
                   
22/24 Little Medium Olive Mayfly
Baetis pygmalus
                   
12/14 White Fly Mayfly
Ephoron album
                   
14/16 Slate Wing Brown Mayfly
Baetis heimalis
                   
4/16 Eggs
Steelhead/Salmon/Trout