Leech Lake sample

Discussion in 'Fly Fishing Entomology' started by jwg, Jul 14, 2013.

  1. jwg Active Member

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    Water temperature was 58 degrees F Saturday at Leech Lake, down from temperatures in the 60s the previous two weekends.

    In the morning, fishing was slow for everyone I could see.

    This sample, see picture below, was taken midmorning from a Rainbow trout
    These looked a lot greener in reality than they do in the photo.

    I am thinking perhaps these are chironomid pupa taken while emerging.

    If so, perhaps the fly in this link would have been useful. ?


    ndmslm likes this.
  2. zen leecher aka bill w born to work, forced to fish

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    A couple have prominent wing pads. Those are chironomids.
  3. Irafly Active Member

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    Yep, these are mids, and seeing little to no chroming indicates to me, that these bugs were not ready to molt out as adults for at least a day or two. These mids were likely sitting anywhere from 3" to a foot off the bottom, staging to rise at some point later. Thus the over all effectiveness of an accurate vertical presentation.
  4. Taxon Moderator

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    Hi Jay-

    What I'm seeing in your sample are two varieties of Chironomid pupae and one Biting Midge larva, as represented by cropping the following from your photo:

  5. Tom Bowden Active Member

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    Is a "biting midge" a mosquito?

  6. Taxon Moderator

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    Hi Tom-
    No, a mosquito is a Dipteran of family Culicidae, whereas a biting midge (sometimes also referred to a no-see-um) is a Dipteran of family Ceratopogonidae. Please see Aquatic / Semiaquatic True Fly Taxonomic Structure.
  7. Tom Bowden Active Member

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    Roger, thanks!