mayfly on my automobile

Discussion in 'Fly Fishing Entomology' started by Travis Bille, Apr 13, 2014.

  1. Travis Bille

    Travis Bille Active Member

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    Found this pretty big feller on the hood of my car this evening. This is by far the biggest mayfly I have ever seen around these parts. Its a camera picture, so excuse the quality.

    I put a dime next to it for a size reference. Its quite a pretty bug

    Any guesses what it is? I would guess march brown, but I don't have my hatch guide to western streams book handy as it was stolen by my 2 year old daughter so she could flip through pages saying "BUGS! FLIES!"

    IMG_20140413_193612_019.jpg IMG_20140413_193705_950.jpg
     
  2. Taxon

    Taxon Moderator Staff Member

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    Travis-

    I believe this male imago to be of genus Rhithrogena. And based on its body length, which I estimate to be 13.425 mm based on it being 3/4 the diameter of a dime (17.9 mm), it is likely to be R. flavianula. So, your guess of (Western) March Brown is spot on.
     
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  3. Teenage Entomologist

    Teenage Entomologist Gotta love the pteronarcys.

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    Travis, definetely a March Brown. They are hatching in my area also.
     
  4. Travis Bille

    Travis Bille Active Member

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    Whoo hoo! I love it when I guess right. Thanks guys
     
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  5. Teenage Entomologist

    Teenage Entomologist Gotta love the pteronarcys.

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    Best insect book ever!
    image.jpg