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Latest updates, page 110

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Updates from May 22, 2004

Closeup insects by Troutnut from Miscellaneous Wisconsin and the Namekagon River in Wisconsin

Male Ephemerella excrucians (Pale Morning Dun) Mayfly Dun
View 3 Pictures

Male Baetisca laurentina (Armored Mayfly) Mayfly Dun
View 5 Pictures

Male Ephemerella invaria (Sulphur Dun) Mayfly Dun
View 4 Pictures

Male Baetisca laurentina (Armored Mayfly) Mayfly Dun
View 5 Pictures

Female Baetidae (Blue-Winged Olives) Mayfly Dun
View 3 Pictures

Male Ephemerella invaria (Sulphur Dun) Mayfly Dun
View 3 Pictures

Female Baetidae (Blue-Winged Olives) Mayfly Dun
View 3 Pictures

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Updates from May 20, 2004

Closeup insects by Troutnut from Miscellaneous North Carolina and Miscellaneous Wisconsin in North Carolina and Wisconsin

Neoephemera Mayfly Nymph

View 7 PicturesThis specimen was sent to me for identification by Caleb Boyle, who did such a good job taking pictures of his mystery mayfly that, after identification, I asked him for permission to add it to this site, which he granted. This is great luck, since Neoephemera is a rare mayfly and it's unlikely I would ever have collected a specimen for the site myself.

Caleb collected it in mid-late May of 2004 either McDowell County or Ashe County in North Carolina, in a riffle less than two feet deep in a cold trout stream. He reared the nymph into a dun, whose wings appear in one of the photos below. He describes the specimen as follows:

Nymph exoskeleton:
Body: 16-17mm
Tails: 3, equal length, 13mm
Found on the surface of the water. The gill cover covers ab. segments 3-5.

Subimago (Subimago: Mayfly nymphs emerge from the water into subimagoes, better known to anglers as "duns." They are a sexually immature, winged, recognizably adult stage and they must molt one more time into imagoes or "spinners" before they can mate.):
Body: 16mm, dark brown/ olive
Tails: 3, equal length, 14mm
Wings: dark slate color, large hind wings.

I don't know to which species it belongs, but its size rules out the most common one in the genus, Neoephemera bicolor. It matches the size of Neoephemera purporea so that is a likely other possibility, but there are two other candidate species (Neoephemera compressa and Neoephemera youngi) about which I have no information, so I can't rule them out.

Disregard the camera, region, and exact date listed on these photos. I still need to update the site to accommodate user contributions which don't use my equipment.

Collected May 20, 2004 from unknown in North Carolina
Added to Troutnut.com by Troutnut on March 20, 2007

Female Leptophlebia cupida (Borcher Drake) Mayfly Spinner

View 3 PicturesI'm not positive of the collection date on this one, so I'm guessing.

Collected May 20, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Female Leptophlebia cupida (Borcher Drake) Mayfly Spinner

View 3 PicturesI'm not positive of the collection date on this one, so I'm guessing.

Collected May 20, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

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Updates from May 19, 2004

Closeup insects by Troutnut from the Bois Brule River and Miscellaneous Wisconsin in Wisconsin

Female Ephemerella subvaria (Hendrickson) Mayfly Spinner

View 3 PicturesThis one's a bit bedraggled because it was rainy and I had a hard time keeping anything dry, including the container I was putting mayflies in. I was practically juggling up there balanced on a rock trying to catch mayflies and trout at the same time.

Collected May 19, 2004 from the Bois Brule River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Female Ephemerella subvaria (Hendrickson) Mayfly Spinner

View 3 Pictures

Collected May 19, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

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Updates from May 18, 2004

Closeup insects by Troutnut from Miscellaneous Wisconsin and the Namekagon River in Wisconsin

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Updates from May 16, 2004

Closeup insects by Troutnut from Miscellaneous Wisconsin in Wisconsin

Female Hydropsyche (Spotted Sedges) Caddisfly Adult
View 4 Pictures

Male Ephemerella subvaria (Hendrickson) Mayfly Spinner
View 2 Pictures

Female Ephemerella subvaria (Hendrickson) Mayfly Spinner
View 2 Pictures

Female Cheumatopsyche (Little Sister Sedges) Caddisfly Adult
View 3 Pictures

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Jargon Defined:

Dun: Mayflies have two adult stages. They first emerge from the water as duns (scientifically known as the subimago stage). They then molt into the spinner (imago) stage, in which they mate and die. Sometimes the word "dun" is confusingly used to refer to a brownish gray color in fly tying materials.

Nymph: The juvenile, underwater stages of mayflies, stoneflies, dragonflies, and damselflies and other aquatic insects whose juvenile stages are covered by hard exoskeletons. The word can also refer to the fishing flies which imitate these creatures, in which case it is used as a blanket term for flies imitating any underwater stage of an invertebrate (except for crayfish and leeches).

Subimago: Mayfly nymphs emerge from the water into subimagoes, better known to anglers as "duns." They are a sexually immature, winged, recognizably adult stage and they must molt one more time into imagoes or "spinners" before they can mate.