Aquatic Insects of Central Virginia
Saturday, September 24, 2016
Acroneuria evoluta: the Rivanna River at Crofton
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These brown stoneflies were fairly common today at the Rivanna River at Crofton. I picked up about 10 to look at for photos, and while I...
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Friday, September 23, 2016
Habitat, species variation, and tolerance values: the common stonefly Acroneuria abnormis
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I have written before about the issue of habitat and species variation -- in some detail on 8/26/15. Let me remind you of two examples. ...
Thursday, September 22, 2016
It's Acroneuria lycorias -- not carolinensis -- at Buck Mt. Creek
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Kind of messed up today with my photos. Somehow, I had my camera set to "Aperture priority" mode (Av) -- instead of the "...
Thursday, September 15, 2016
Fall Stoneflies in the Rivanna: Two things I "hoped" to find; two things I "expected" to find -- and a surprise netspinner
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The common stonefly (Perlidae), Agnetina flavescens (Midwestern Stone). This is a species that I've only seen once before. That wa...
Tuesday, September 6, 2016
Very strange things in the water: a common netspinner pupa
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No, it is not a baby chicken. It's a common netspinner pupa, Hydropsyche / Ceratopsyche sp. And it's been so long that I'v...
Saturday, September 3, 2016
Nymphal growth, instars, and frequency of molting
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Yesterday, I went to the lower Doyles River -- shortly before it enters the Moormans. While I didn't see much of interest, I did fin...
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