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Updates from January 13, 2004

Videos by Troutnut from the Namekagon River and the Marengo River in Wisconsin

Dragonfly Nymph Scooting Around
Dragonfly nymphs propel themselves through the water with a miniature jet engine, taking water in below their mouths and shooting it out their back ends. You can see the ripples from the jet out this one's back in this video.
Date ShotJan 13, 2004
Date AddedMar 31, 2006
AuthorTroutnut
Ephemera 1
Date ShotJan 13, 2004
Date AddedMar 31, 2006
AuthorTroutnut
Ephemera 2
This little Ephemera nymph swam around for a while and tried to burrow into the sand in my photography tank.
Date ShotJan 13, 2004
Date AddedMar 31, 2006
AuthorTroutnut

Closeup insects by Troutnut from the Namekagon River in Wisconsin

Gomphidae Dragonfly NymphGomphidae  Dragonfly Nymph View 3 Pictures
Collected January 13, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Cambaridae Crayfish JuvenileCambaridae  Crayfish Juvenile View 2 Pictures
Collected January 13, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Hydrophilidae (Giant Water Scavenger Beetles) Beetle AdultHydrophilidae (Giant Water Scavenger Beetles) Beetle Adult View 2 PicturesThis is a water beetle. It is the hardest object in the world to pick up with tweezers. The second hardest is Mount Everest.
Collected January 13, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Gasterosteidae (Sticklebacks) Stickleback AdultGasterosteidae (Sticklebacks) Fish Adult View 3 PicturesBrook Stickleback
Culea inconstans
Collected January 13, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Amphipoda (Scuds) Scud AdultAmphipoda (Scuds) Arthropod Adult View 2 Pictures
Collected January 13, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Ephemerella (Hendricksons, Sulphurs, PMDs) Mayfly NymphEphemerella (Hendricksons, Sulphurs, PMDs) Mayfly Nymph View 3 PicturesMorphologically this one looks a lot like subvaria but the color is really different.
Collected January 13, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Tipulidae (Crane Flies) Crane Fly LarvaTipulidae (Crane Flies) True Fly Larva View 3 Pictures
Collected January 13, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Belostoma flumineum (Electric Light Bug) Giant Water Bug AdultBelostoma flumineum (Electric Light Bug) Giant Water Bug Adult View 4 PicturesI haven't seen the imitation of these things stressed, but in August 2003 on one of my favorite rivers the largest brown trout I kept had stomachs full of these things.
Collected January 13, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Cordulegaster Dragonfly NymphCordulegaster  Dragonfly Nymph View 4 PicturesThis is a realy big, dark dragonfly nymph. Notice how "fuzzy" it is--it's covered with small hairs that collect sediment and debris and camouflage the nymph to match its natural surroundings. The greenish cast in some of the photos of this specimen is due to strange lighting during my first night photographing things for this site.
Collected January 13, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Acroneuria lycorias (Golden Stone) Stonefly NymphAcroneuria lycorias (Golden Stone) Stonefly Nymph View 4 PicturesThe presence of anal gills, large dark spot in the center of the pale occipital bar point to lycorias.
Collected January 13, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Gomphidae Dragonfly NymphGomphidae  Dragonfly Nymph View 2 Pictures
Collected January 13, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Ephemerella subvaria (Hendrickson) Mayfly NymphEphemerella subvaria (Hendrickson) Mayfly Nymph View 4 PicturesThese are two common color patterns on Hendrickson nymphs. I suspect that one is male and the other female, but I don't know for sure.
Collected January 13, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Cottidae (Sculpins) Sculpin AdultCottidae (Sculpins) Fish Adult View 4 PicturesMottled Sculpin
Cottus bairdi
Collected January 13, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Gasterosteidae (Sticklebacks) Stickleback AdultGasterosteidae (Sticklebacks) Fish Adult View 3 PicturesBrook Stickleback
Culea inconstans
Collected January 13, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Cottidae (Sculpins) Sculpin AdultCottidae (Sculpins) Fish Adult View 1 PicturesMottled Sculpin
Cottus bairdi
Collected January 13, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Percidae (Perch, Walleyes, and Darters) Fish AdultPercidae (Perch, Walleyes, and Darters) Fish Adult View 1 PicturesJohnny Darter (Etheostoma nigrum)
Collected January 13, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Isonychia (Slate Drakes) Mayfly NymphIsonychia (Slate Drakes) Mayfly Nymph View 3 PicturesThis smaller Isonychia nymph was caught with a bunch of bicolor specimens, but it does not have the fluffy spine structure at the base of its gills. This might mean it's Isonychia sayi, or it might just be a bicolor nymph too young to have developed those structures.
Collected January 13, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Ephemeroptera (Mayflies) Mayfly NymphEphemeroptera (Mayflies) Insect Nymph View 3 PicturesThis nymph is far too small to identify from these poor pictures. I collected it the first day I started taking pictures for this site.
Collected January 13, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Baetidae (Blue-Winged Olives) Mayfly NymphBaetidae (Blue-Winged Olives) Mayfly Nymph View 3 PicturesThis one's tails are chopped off and it's missing a leg.
Collected January 13, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Epeorus vitreus (Sulphur) Mayfly NymphEpeorus vitreus (Sulphur) Mayfly Nymph View 3 PicturesI suspect this is an Epeorus vitreus nymph. At the current instar (Instar: Many invertebrates molt through dozens of progressively larger and better-developed stages as they grow. Each of these stages is known as an instar. Hard-bodied nymphs typically molt through more instars than soft-bodied larvae.), it's tough to make out the pair of dots on the tergites (
One tergite of this Isonychia bicolor mayfly spinner is highlighted in red.
One tergite of this Isonychia bicolor mayfly spinner is highlighted in red.
Tergite: The top (dorsal) part of a single segment on an insect's abdomen when it consists of a single chitinous plate (sclerite), or an individual sclerite if the segment has more than one.
)
which signify that species, but with zooming and contrast enhancement they become evident.
Collected January 13, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Leucrocuta hebe (Little Yellow Quill) Mayfly NymphLeucrocuta hebe (Little Yellow Quill) Mayfly Nymph View 2 PicturesThis is a very early instar (Instar: Many invertebrates molt through dozens of progressively larger and better-developed stages as they grow. Each of these stages is known as an instar. Hard-bodied nymphs typically molt through more instars than soft-bodied larvae.).
Collected January 13, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Leucrocuta hebe (Little Yellow Quill) Mayfly NymphLeucrocuta hebe (Little Yellow Quill) Mayfly Nymph View 4 PicturesThis is a very early instar (Instar: Many invertebrates molt through dozens of progressively larger and better-developed stages as they grow. Each of these stages is known as an instar. Hard-bodied nymphs typically molt through more instars than soft-bodied larvae.).
Collected January 13, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Ephemeroptera (Mayflies) Mayfly NymphEphemeroptera (Mayflies) Insect Nymph View 3 PicturesThis nymph is far too small to identify from these poor pictures. I collected it the first day I started taking pictures for this site.
Collected January 13, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Ephemeroptera (Mayflies) Mayfly NymphEphemeroptera (Mayflies) Insect Nymph View 3 PicturesThis nymph is far too small to identify from these poor pictures. I collected it the first day I started taking pictures for this site.
Collected January 13, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Capniidae (Snowflies) Stonefly NymphCapniidae (Snowflies) Stonefly Nymph View 3 Pictures
Collected January 13, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

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