Don't be fooled by the title! This hatch chart encompasses 46 different 'hatches' that are applicable to the entire US. It's ready to print out and keep by your tying desk for ready reference (Web, PDF and Excel formats). It's the most complete hatch chart on the net!
Ephemera sp. Mayfly
Kim Conrad photo
This hatch chart is representative of most common Midwestern United States hatches (Minnesota, Wisconsin, Illinois, Ohio, Michigan & Southern Ontario Canada). For colder weather, adjust the chart 1-2 weeks out and for warmer weather, adjust the chart 1-2 weeks in advance.
The lighter colored bars (
) represent marginal periods to fish the emerger or dry fly pattern. It's best to fish nymphs during this timeframe.
The darker colored bars (
) represent peak periods where surface action will be at its' finest. Be sure to fish emergers and dry flies during this period.
| Name | Size | J | F | M | A | M | J | J | A | S | O | N | D | ||||||||||||
| Ants Beetles Crickets Grasshoppers |
12-18 |  |
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| Leeches | 4-10 | |
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| Sculpins | 1/0-10 | |
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| Freshwater shrimp (scuds) |
12-20 | |
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| Midge chironomids |
16-28 | |
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| Tiny Winter Black Stonefly | 12-18 | |
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| Baetis (transitional season hatches) baetis spp |
18-20 | |
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| Early Stonefly | 4-14 | |
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| Micro Caddis hydroptilitdae |
18-22 | |
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| Blue Quill P. adoptiva |
16-20 | |
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| Grannom Caddis Brachycentrus spp |
14-16 | |
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| Sulphers Ephemerella spp |
14-16 | |
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| Yellow Sally's Isoperia spp |
10-12 | |
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| Brown Stonefly Cultus decisus |
10 | |
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| Gray Drake Siphlonurus sp |
10-12 | |
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| March Brown (Gray Fox) S. vicarium |
10-14 | |
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| Slate Drakes Isonychia bicolor |
10-12 | |
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| Early Brown Stonefly | 12-16 | |
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| Dark Hendrickson Ephemerella subvaria |
12-14 | |
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| Mahogany Dun Paraleptaphlebia adoptiva |
16-18 | |
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| Large Black Stonefly | 2-6 | |
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| Dark Hendrickson Ephemerella subvaria |
12-14 | |
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| Black Caddis Chimarra spp |
16-18 | |
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| Slate Wing Mahogany paraleptophlebia adoptiva |
16-18 | |
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| Early BWO's (blue winged olives) |
18-24 | |
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| Green Rock Worm Caddis | 10-18 | |
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| Cranefly | 10-14 | |
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| Sulpher Dun Ephemerella dorothea |
16-18 | |
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| Brown Drakes Ephemera simulans |
10-12 | |
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| True Hendrikson Ephemerella invaria |
14-16 | |
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| Light Hendrickson Ephemerella rotunda |
14-16 | |
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| March Brown Stenonenum vicarium |
10-12 | |
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| Summer Stonefly Peridae Perlodidae Chloroperlidae |
4-16 | |
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| Speckled Sedge H. orealis |
12-14 | |
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| Hex Hexagenia limbata |
4-8 | |
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| Cinnamon Sedge Limnephilus spp |
10-12 | |
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| Mottled Sedge Neophylax spp |
10-12 | |
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| Yellow-Brown Stone Agnetina capitata |
6-8 | |
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| Trico Tricorythodes spp |
22-26 | |
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| BWO's (blue winged olives) |
16-20 | |
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| White Millers Nectopsyche spp |
12-14 | |
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| Large Dun Variant Hexagenia atrocaudata |
6-8 | |
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| Baetis (fall hatch) Baetis spp |
18-22 | |
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Wow. What a great c
Wow. What a great chart. Very helpful. Thanks.
In His Love,
Clyde