Updates from May 9, 2007

Mayflies

Caddisflies

Stoneflies

Closeup insects by Troutnut from Factory Brook in New York

Male Epeorus (Little Maryatts) Mayfly Spinner

View 10 PicturesThis spinner and hundreds of others like it were dancing over the road through a very narrow valley carved by a tiny, steep tributary of the trout stream I was fishing. I got strange looks from a few passers-by, standing around on the road with a butterfly net...

Collected May 9, 2007 from Unnamed trib of Factory Brook along 42a in New York
Added to Troutnut.com by Troutnut on May 18, 2007

Female Leptophlebia (Black Quills and Blue Quills) Mayfly Dun

View 7 PicturesI collected this mayfly after user Al514 tipped me off to the presence of some Leptophlebia mayflies I didn't seem to have yet with his ID request of a male dun. This seems to be of the same species. I also collected a female spinner. Based on that spinner, I can tell that this is either Leptophlebia cupida or Leptophlebia nebulosa, but I can't tell which.

Unfortunately none of the specimens I collected made it through the hot, sunny day very well. So the pictures aren't great, but they're better than nothing.

Collected May 9, 2007 from Factory Brook in New York
Added to Troutnut.com by Troutnut on May 18, 2007

Male Neoleptophlebia adoptiva (Blue Quill) Mayfly Spinner

View 7 PicturesBased on the pale longitudinal forewing veins (excepting the costals), dark middle terga (Tergum: the dorsal part of an abdominal segment or segments (terga). Also used to describe the entire abdominal dorsum or the thoracic dorsal segments of Odonata.), and genitalia (Burks '53), this specimen is P. adoptiva.

Collected May 9, 2007 from Factory Brook in New York
Added to Troutnut.com by Troutnut on May 18, 2007

Female Leptophlebia (Black Quills and Blue Quills) Mayfly Spinner

View 6 PicturesI collected this specimen along with a female dun of the same species. Unfortunately it's not in very good shape.

After poking at it for a while under a microscope with a good scientific key in hand, I'm pretty sure this is either Leptophlebia cupida or Leptophlebia nebulosa. I can't tell which.

Collected May 9, 2007 from Factory Brook in New York
Added to Troutnut.com by Troutnut on May 18, 2007

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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.

Spinner: There are two winged stages of adult mayflies. They emerge from the water as duns, molt on land (usually) into their fully mature stage, spinners. As spinners, they mate, lay eggs, and die.

Terga: the dorsal part of an abdominal segment or segments (terga). Also used to describe the entire abdominal dorsum or the thoracic dorsal segments of Odonata.