Blue-winged Olives
Baetis
Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.
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This is a striking caddis larva with an interesting color pattern on the head. Here are some characteristics I was able to see under the microscope, but could not easily expose for a picture:
- The prosternal horn is present.
- The mandible is clearly toothed, not formed into a uniform scraper blade.
- The seems to be only 2 major setae on the ventral edge of the hind femur.
- Chloride epithelia seem to be absent from the dorsal side of any abdominal segments.
Based on these characteristics and the ones more easily visible from the pictures, this seems to be Grammotaulius. The key's description of the case is spot-on: "Case cylindrical, made of longitudinally arranged sedge or similar leaves," as is the description of the markings on the head, "Dorsum of head light brownish yellow with numerous discrete, small, dark spots." The spot pattern on the head is a very good match to figure 19.312 of Merritt R.W., Cummins, K.W., and Berg, M.B. (2019). The species ID is based on Grammotaulius betteni being the only species of this genus known in Washington state.
- The prosternal horn is present.
- The mandible is clearly toothed, not formed into a uniform scraper blade.
- The seems to be only 2 major setae on the ventral edge of the hind femur.
- Chloride epithelia seem to be absent from the dorsal side of any abdominal segments.
Based on these characteristics and the ones more easily visible from the pictures, this seems to be Grammotaulius. The key's description of the case is spot-on: "Case cylindrical, made of longitudinally arranged sedge or similar leaves," as is the description of the markings on the head, "Dorsum of head light brownish yellow with numerous discrete, small, dark spots." The spot pattern on the head is a very good match to figure 19.312 of Merritt R.W., Cummins, K.W., and Berg, M.B. (2019). The species ID is based on Grammotaulius betteni being the only species of this genus known in Washington state.
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Jjlyon01 on May 17, 2008May 17th, 2008, 12:01 pm EDT
Im here in Texas at the Attwater Prairie Chicken National Wildlife Refuge and am dying for trout. All these pictures being posted is making my mouth water. I finally had a day off from the average 14 hour days of collecting bugs to feed to the chicks or building pens or feeding the chicks and was able to drive into Houston with a friends car and pick up my license, a few new flies and some advice from Bass Pro Shops. There are no trout here besides the speckled trout. Many large bass and other panfish unfortunately I haven't had time to find them yet. I am really excited to try my hand at redfish and seatrout but I have to wait for another day off. If anyone has some information that may help me out I will be able to post some pictures of fish hopefully and I will put some up of the prairie and its flora and fauna once I can get my camera cord from New York.
Have fun playing with trout.
Have fun playing with trout.
"I now walk into the wild"
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