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Lateral view of a Female Hexagenia limbata (Ephemeridae) (Hex) Mayfly Dun from the Namekagon River in Wisconsin

Hex Mayflies
Hexagenia limbata

The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.

Mystery Creek # 227 in Montana

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Limnephilus (Summer Flier Sedge) Caddisfly Larva Limnephilus (Summer Flier Sedge) Caddisfly Larva

Case view of a Limnephilus (Limnephilidae) (Summer Flier Sedge) Caddisfly Larva from the Yakima River in Washington

This seems to be a young larva of Limnephilus. Although not clear in the picture, several ventral abdominal segments have chloride epithelia.

7 Recently Added Photos

27" brown trout, my largest ever. It was the sub-dominant fish in its pool. After this, I hooked the bigger one, but I couldn't land it.

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Updates from June 7, 2005

Updates from June 7, 2005

Closeup insects by Troutnut and Bnewell from the Namekagon River and the Vermillion River in Wisconsin and Montana

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Hexagenia limbata (Hex) Mayfly Nymph

Hexagenia limbata (Ephemeridae) (Hex) Mayfly Nymph from the Namekagon River in Wisconsin

7
Male Neoleptophlebia mollis (Jenny Spinner) Mayfly Dun

Lateral view of a Male Neoleptophlebia mollis (Leptophlebiidae) (Jenny Spinner) Mayfly Dun from the Namekagon River in Wisconsin

4
Caenis (Angler's Curse) Mayfly Nymph

Dorsal view of a Caenis (Caenidae) (Angler's Curse) Mayfly Nymph from the Namekagon River in Wisconsin

5
Female Stenonema (March Browns and Cahills) Mayfly Dun

Lateral view of a Female Stenonema (Heptageniidae) (March Browns and Cahills) Mayfly Dun from the Namekagon River in Wisconsin

4
Female Epeorus vitreus (Sulphur) Mayfly Dun

Female Epeorus vitreus (Heptageniidae) (Sulphur) Mayfly Dun from the Namekagon River in Wisconsin

3
Eurylophella (Chocolate Dun) Mayfly Nymph

Dorsal view of a Eurylophella (Ephemerellidae) (Chocolate Dun) Mayfly Nymph from the Namekagon River in Wisconsin

2
Siphlonurus alternatus (Gray Drake) Mayfly Nymph

Dorsal view of a Siphlonurus alternatus (Siphlonuridae) (Gray Drake) Mayfly Nymph from the Namekagon River in Wisconsin

3
Male Attenella attenuata (Blue-Winged Olive) Mayfly Dun

Lateral view of a Male Attenella attenuata (Ephemerellidae) (Blue-Winged Olive) Mayfly Dun from the Namekagon River in Wisconsin

This specimen came from the same hatch as a female.

4
Female Attenella attenuata (Blue-Winged Olive) Mayfly Dun

Lateral view of a Female Attenella attenuata (Ephemerellidae) (Blue-Winged Olive) Mayfly Dun from the Namekagon River in Wisconsin

This specimen came from the same hatch as a male.

2
Stenonema mediopunctatum (Cream Cahill) Mayfly Nymph

Dorsal view of a Stenonema mediopunctatum (Heptageniidae) (Cream Cahill) Mayfly Nymph from the Namekagon River in Wisconsin

4
Stenonema mediopunctatum (Cream Cahill) Mayfly Nymph

Dorsal view of a Stenonema mediopunctatum (Heptageniidae) (Cream Cahill) Mayfly Nymph from the Namekagon River in Wisconsin

3
Baetisca laurentina (Armored Mayfly) Mayfly Nymph

Dorsal view of a Baetisca laurentina (Baetiscidae) (Armored Mayfly) Mayfly Nymph from the Namekagon River in Wisconsin

5
Ephemerella needhami (Little Dark Hendrickson) Mayfly Nymph

There are postero-lateral projections on adominal segments 4-9.

Dorsal view of a Ephemerella needhami (Ephemerellidae) (Little Dark Hendrickson) Mayfly Nymph from the Namekagon River in Wisconsin

I took quite a few notes at the microscope when I collected this specimen. They're attached to the appropriate pictures. I found this specimen in the same collection as a similar one. Since I only have strange views of this one, it's possible that they're actually the same specimen and I somehow confused my picture-ordering and got the impression that they're different nymphs.

3
Ephemerella needhami (Little Dark Hendrickson) Mayfly Nymph

Dorsal view of a Ephemerella needhami (Ephemerellidae) (Little Dark Hendrickson) Mayfly Nymph from the Namekagon River in Wisconsin

2
Ephemerella (Hendricksons, Sulphurs, PMDs) Mayfly Nymph

Ventral view of a Ephemerella (Ephemerellidae) (Hendricksons, Sulphurs, PMDs) Mayfly Nymph from the Namekagon River in Wisconsin

I found this specimen in the same collection as a similar one. Since I only have strange views of this one, it's possible that they're actually the same specimen and I somehow confused my picture-ordering and got the impression that they're different nymphs.

1
Alloperla (Sallfly) Stonefly Nymph

Alloperla (Chloroperlidae) (Sallfly) Stonefly Nymph from the Vermillion River in Montana

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