Updates from October 22, 2011

Mayflies

Caddisflies

Stoneflies

Closeup insects by Entoman from the Fall River and the Susquehanna River in California and Pennsylvania

Female Paraleptophlebia debilis (Mahogany Dun) Mayfly Dun

View 3 PicturesSize: 9mm. These photos really highlight the brown pigmentation of the wing venation (Venation: The pattern in which the veins on the wings of an insect are arranged. It is usually one of the most useful identifying characteristics.), but in the hand the wings look to be a uniform smokey gray. - Entoman

Collected October 22, 2011 from the Fall River in California
Added to Troutnut.com by Entoman on February 4, 2012

Male Heptagenia culacantha Mayfly Spinner

View 1 PicturesThis photo was provided by guide Eric Naguski along with the following comments, "I took this photo just upstream of Three Mile Island on the east shore of the Susquehanna River just below where the Swatara Creek enters. The Susquehanna is not an easy river to sample for bugs in my opinion. It is very large and pushes a lot of water. Especially in the spring when you would collect mature culacantha nymphs. And I don't believe that there are a ton of these Heptageniids around. Also the people who are doing most of the sampling like myself are doing so for water quality monitoring work so they only take the specimens down to genus-level taxonomy".

Collected October 22, 2011 from the Susquehanna River in Pennsylvania
Added to Troutnut.com by Entoman on February 10, 2012

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Jargon Defined:

Nymphs: 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).

Venation: The pattern in which the veins on the wings of an insect are arranged. It is usually one of the most useful identifying characteristics.