Discussion in 'Fly Fishing Entomology' started by mike doughty, Jan 27, 2008.

  1. so i've always wondered, what constitutes a spinner, what are the qualifications of one and when does one become one?
  2. im pretty sure its as soon as an insect can fly
  3. Mike-

    I’m a bit les convinced than Rory seems to be, that you're referring to a mayfly spinner. Perhaps you’re even talking about one of OMJ’s DuPont Spinners, but I’ll provide you with a gross oversimplification, just in case that’s really what you're asking.

    Mayflies are the only insects with more than one winged lifestage. Upon emergence they are winged, but not yet sexually mature. This lifestage is called a dun, sub-adult, or sub-imago. Some time later, anywhere from minutes to days depending upon the species, the sexually immature winged lifestage undergoes a subsequent molt, and become a sexually mature spinner, adult, or imago. The so-called “spinner fall” follows egg-laying for the female, and copulation for the male, and is when the spinner collapses on (or to) the surface of the water, wings extended to the sides, and expires.
  4. Thats an easy i.d.

    Under 5'4, and less than 110lbs. Usually is involved with gymnastics or yoga.

  5. That's what I'm thinking about! True love.
  6. Just dont mess around with her friend or she will follow you to high school football practice and throw a photo album at you! Trust me :rofl:
  7. sounds like there is no way to tell between a dun and spinner then. is that correct? i was just wondering how i could look at a mayfly and say it's a spinner
  8. The easiest way to identify Spinners are by the wings, usually clear and shiny, while duns are usually opaque. The body is a bit thinner and longer on a spinner, the tails are usually longer as well.
  9. iagree
    Darker in color as well
  10. thanks for the responses
  11. Duns or sub-imagos are usually just that dun-colored. In fact they are called duns because the dun stage of the most common English mayfly (Ephemerella danica) which, in England, is just called the mayfly, is dun-colored (or should that be coloured?); a dull grayish-brown. The colors of all duns are subdued and the colors of both body and wings have a waxy, almost dusty appearance. After the final molt, the body has a brighter, shiny appearance and the wings are transparent though they still may have some dark spotting; for instance the leading edge of the wings of the Callibaetis spinner (particularly the male).

    Here are pictures of a Callibaetis dun and a spinner
  12. thanks preston
  13. They must not have light colored mayflies in Britian, from my experience relating the color dun to most mayfly duns is a stretch.

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