Yak bug

Discussion in 'Fly Fishing Entomology' started by Chromer, Mar 9, 2008.

  1. Chromer

    Chromer Defeat terrorism

    Joined:
    Jan 21, 2004
    Messages:
    371
    Media:
    25
    Likes Received:
    0
    Location:
    Newcastle, WA.
    March 9 2008

    Every 3rd rock has 4 of these guys under it. This bug was kept in the boat - within 1 hour it had molted out and sprung wings!

    [​IMG]

    A couple were seen flying around the walking bridge too - nowhere near clielm.
     
  2. cabezon

    cabezon Sculpin Enterprises

    Joined:
    Nov 14, 2004
    Messages:
    1,795
    Media:
    224
    Likes Received:
    301
    Location:
    Olympia, WA
    Hi Chromer,

    Those look like Skwalas. The males cannot fly. They wait under cover near the waters edge during the day. They come out from under cover at night (see www.washingtonflyfishing.com/gallery/showphoto.php?photo=12889&ppuser=3541) as new females emerge and pass along their genetic material (see www.washingtonflyfishing.com/gallery/showphoto.php?photo=12887&ppuser=3541). It can be quite a mob scene with several males trying to succeed with a single female. The flying versions would be slightly larger females.

    Steve
     
  3. JE

    JE Active Member

    Joined:
    Mar 31, 2005
    Messages:
    308
    Likes Received:
    60
    Location:
    Great NW
    Nice photo, and it looks like you got the right imitation for it as well. How was the fishing?
    -JE
     
  4. Taxon

    Taxon Moderator Staff Member

    Joined:
    Aug 22, 2004
    Messages:
    976
    Likes Received:
    118
    Location:
    Mercer Island, WA
    Chromer-

    Your photo is of a Skwala, either S. americana or S. curvata, not sure which, and it is right on schedule. They are a member of family Perlodidae (Patterned Stoneflies), and commonly referred to as Skwalas, Medium Brown Stones, Spring Stones, etc.
     
  5. Itchy Dog

    Itchy Dog Some call me Kirk Werner

    Joined:
    Aug 22, 2005
    Messages:
    3,851
    Media:
    161
    Likes Received:
    494
    Location:
    Doo-vall
    Home Page:
    Ah, the time for skwalas is here (shhh, don't tell anyone).;)
     
  6. Nolan

    Nolan New Member

    Joined:
    Aug 15, 2005
    Messages:
    53
    Likes Received:
    0
    Location:
    Burien, WA
    I was on the Yak in Cle Elum on Saturday and saw the black versions size 10-12 and smaller ones size 16-18. There were certainly few and far between. I saw 2 of the large version and about 40 of the smaller ones.
     
  7. Tylerflies

    Tylerflies New Member

    Joined:
    Oct 12, 2007
    Messages:
    116
    Likes Received:
    0
    Location:
    Bellingham, WA
    awsome picture. I have been wondering what those little guys looked like. thanks
     

Share This Page