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Latest updates, page 115

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Updates from March 19, 2004

Photos by Troutnut from Eighteenmile Creek in Wisconsin

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This pretty little early season brown trout saved me from getting skunked.

StateWisconsin

LocationEighteenmile Creek

Date TakenMar 19, 2004

Date AddedJan 25, 2006

AuthorTroutnut

CameraOlympus C740UZ

Underwater photos by Troutnut from Eighteenmile Creek in Wisconsin

This is my favorite underwater picture so far. It shows a bunch of Simuliidae (black fly) larvae clinging to a rock and swinging in the fast current. There are also at least four visible mayfly nymphs, probably in the family Baetidae. In this picture: True Fly Family Simuliidae (Black Flies) and Mayfly Family Baetidae (Blue-Winged Olives). From Eighteenmile Creek in Wisconsin.

There are several mayfly and stonefly nymphs clinging to this log. In this picture: Mayfly Family Baetidae (Blue-Winged Olives) and Stonefly Family Taeniopterygidae (Willowflies). From Eighteenmile Creek in Wisconsin.

Light reflected from air bubbles left ghostly wisps in this fairly long exposure picture beneath a riffle. It's got an accidental artistic look. From Eighteenmile Creek in Wisconsin.

Several Baetid mayfly nymphs cling to this rock. There are also some clumps of small stones which hold strong caddisfly larvae. In this picture: Mayfly Family Baetidae (Blue-Winged Olives) and Insect Order Trichoptera (Caddisflies). From Eighteenmile Creek in Wisconsin.

A peculiar mayfly nymph clings to a log. I'm not sure if it's a Heptageniid clinger or a flat-bodied Ephemerellid crawler, but I don't believe it's a species I've collected yet. In this picture: Insect Order Ephemeroptera (Mayflies). From Eighteenmile Creek in Wisconsin.

A small stonefly nymph crawls around some gravel. In this picture: Insect Order Plecoptera (Stoneflies). From Eighteenmile Creek in Wisconsin.

In this picture: Mayfly Family Baetidae (Blue-Winged Olives). From Eighteenmile Creek in Wisconsin.

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Updates from March 18, 2004

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

Taeniopteryx nivalis (Early Black Stonefly) Stonefly Nymph

View 2 PicturesI found this nymph wriggling in the surface film during a hatch of related Strophopteryx adults. This nymph died in transport so it's not alive in the photos, but it's pretty close to its live colors.

Collected March 18, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Male Strophopteryx fasciata (Mottled Willowfly) Stonefly Adult

View 4 Pictures

Collected March 18, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

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Updates from March 17, 2004

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

Ephemerella subvaria (Hendrickson) Mayfly Nymph

View 3 PicturesThis is one of the nymphs I collected doing something very, very strange on March 17th 2004. In the middle of the day, around 2 pm, in the water right around my feet I watched lots of Ephemerella nymphs clumsily swimming up all the way to the surface and then just kind of drifting and wiggling around in the water column. None hatched. They seemed to do it more intensely when the sun was out. It wasn't the time of day for the normal invertebrate drift phenomenon, and as far as I know invertebrate drift doesn't involve this kind of clear effort to swim all the way to the surface. I didn't need a net to catch them, I just reached down into the water and grabbed them with my fingers just below the surface.

The prominent abdominal tubercles (

A few (not all) of the abdominal tubercles on this Ephemerella needhami nymph are circled. They are especially large in this species.

Tubercle: Various peculiar little bumps or projections on an insect. Their character is important for the identification of many kinds of insects, such as the nymphs of Ephemerellidae mayflies.) aren't quite black, though, and the general color is a dark brown, though I saw nymphs with all Hendrickson color stages behaving strangely.

Collected March 17, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Ephemerella subvaria (Hendrickson) Mayfly Nymph

View 2 PicturesHere's another of the nymphs I collected behaving strangely, as described for this specimen.

Collected March 17, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

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Updates from March 16, 2004

Closeup insects by Troutnut from the Namekagon River in Wisconsin

Female Strophopteryx fasciata (Mottled Willowfly) Stonefly Adult

View 4 PicturesSeveral stoneflies of this species were the first adult insects I found in 2004 when I started this site. The hatch was sparse but lasted a good part of the day, and I noted a few good rises despite the early season cold. They ended up struggling on the water's surface fairly often.

Collected March 16, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Female Strophopteryx fasciata (Mottled Willowfly) Stonefly Adult

View 5 PicturesSeveral stoneflies of this species were the first adult insects I found in 2004 when I started this site. The hatch was sparse but lasted a good part of the day, and I noted a few good rises despite the early season cold. They ended up struggling on the water's surface fairly often.

Collected March 16, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Male Strophopteryx fasciata (Mottled Willowfly) Stonefly Adult

View 2 PicturesThis male died overnight before I had the chance to photograph him, so his abdomen is shorter than it should be because it shriveled a bit.

Collected March 16, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

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Updates from March 10, 2004

Closeup insects by Troutnut from Miscellaneous Wisconsin in Wisconsin

Ranatra Water Scorpion Adult
View 7 Pictures

Ephemerella subvaria (Hendrickson) Mayfly Nymph
View 3 Pictures

Pteronarcys dorsata (Giant Black Stonefly) Stonefly Nymph
View 3 Pictures

Strophopteryx fasciata (Mottled Willowfly) Stonefly Nymph
View 2 Pictures

Phryganeidae Caddisfly Larva
View 3 Pictures

Siphloplecton basale (Pseudo-Gray Drake) Mayfly Nymph
View 3 Pictures

Ephemerella (Hendricksons, Sulphurs, PMDs) Mayfly Nymph
View 3 Pictures

Ephemerella invaria (Sulphur Dun) Mayfly Nymph
View 3 Pictures

Ephemerella (Hendricksons, Sulphurs, PMDs) Mayfly Nymph
View 2 Pictures

Ephemerella invaria (Sulphur Dun) Mayfly Nymph
View 2 Pictures

Maccaffertium modestum (Cream Cahill) Mayfly Nymph
View 3 Pictures

Ephemerella invaria (Sulphur Dun) Mayfly Nymph
View 3 Pictures

Eurylophella (Chocolate Duns) Mayfly Nymph
View 2 Pictures

Ephemerellidae (Hendricksons, Sulphurs, PMDs, BWOs) Mayfly Nymph
View 3 Pictures

Maccaffertium modestum (Cream Cahill) Mayfly Nymph
View 2 Pictures

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Jargon Defined:

Abdomen: The rear and usually the longest (ten-segmented in mayflies) portion of an insect's body, to which the tails are attached.

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).

A few (not all) of the abdominal tubercles on this Ephemerella needhami nymph are circled. They are especially large in this species.

Tubercles: Various peculiar little bumps or projections on an insect. Their character is important for the identification of many kinds of insects, such as the nymphs of Ephemerellidae mayflies.