Lateral view of a Male Baetis (Baetidae) (Blue-Winged Olive) Mayfly Dun from Mystery Creek #43 in New York

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.

Here Oksrukuyik Creek flows away from the Dalton Highway toward the pipeline. It eventually grows into one of the major rivers of the North Slope, and the main drainage to the west of the Sag, but where it crosses the road it's just a small grayling stream.

From Oksrukuyik Creek in Alaska

Stream photos

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Glossosoma (Little Brown Short-horned Sedge) Caddisfly Larva Glossosoma (Little Brown Short-horned Sedge) Caddisfly Larva

Dorsal view of a Glossosoma (Glossosomatidae) (Little Brown Short-horned Sedge) Caddisfly Larva from the Yakima River in Washington

I caught this tiny larva without a case, but it seems to key pretty clearly to to Glossosomatidae. From there, the lack of sclerites on the mesonotum points to either Glossosoma or Anagapetus. Although it's difficult to see in a 2D image from the microscope, it's pretty clear in the live 3D view that the pronotum is only excised about 1/3 of its length to accommodate the forecoxa, not 2/3, which points to Glossosoma at Couplet 5 of the Key to Genera of Glossosomatidae Larvae.

11 Recently Added Photos

27" brown trout, my largest ever. It was the sub-dominant fish in its pool. After this, I hooked the bigger one, but I couldn't land it.

Troutnut is a project started in 2003 by salmonid ecologist Jason "Troutnut" Neuswanger to help anglers and fly tyers unabashedly embrace the entomological side of the sport. Learn more about Troutnut or support the project for an enhanced experience here.

Hexagenia orlando

This topic is about the Mayfly Genus Hexagenia

These are huge mayflies. Hexagenia limbata, by far the most important species, is the second largest mayfly in the United States. The largest is its close relative, Litobrancha recurvata, which until recently was also in the genus Hexagenia.

Two minor species, Hexagenia atrocaudata and Hexagenia rigida, may be noticed later in the season than limbata.

Read each species page for emergence and other details.

Example specimens

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Female Hexagenia limbata (Hex) Mayfly Dun

Lateral view of a Female Hexagenia limbata (Ephemeridae) (Hex) Mayfly Dun from the Namekagon River in Wisconsin

This female Hex dun emerged around 11 pm, one of relatively few on the water as I rushed back to the truck to beat an approaching thunderstorm. Her tails in reality were longer than shown in the picture, but they broke off.

6
Male Hexagenia limbata (Hex) Mayfly Spinner

Artistic view of a Male Hexagenia limbata (Ephemeridae) (Hex) Mayfly Spinner from the Namekagon River in Wisconsin

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Male Hexagenia limbata (Hex) Mayfly Spinner

Lateral view of a Male Hexagenia limbata (Ephemeridae) (Hex) Mayfly Spinner from Atkins Lake in Wisconsin

Curtis
Posts: 2

Curtis on Feb 29, 2008February 29th, 2008, 10:05 am EST

Does anyone have any hatch dates for hexagenia orlando in the Central Florida area? Several lakes near me have populations and I am gathering data. I have photos and one hatch record.

Taxon

Site Editor
Plano, TX

Posts: 1311

Taxon on Feb 29, 2008February 29th, 2008, 4:33 pm EST

Curtis-

The Mayflies of Florida by Lewis Berner and Manuel L. Pescador contains seven pages discussing Hexagenia orlando. Although this species is known to emerge in Florida from March to December, peak emergences are said to be in July and August. Also mentioned are the tendency of brooding in this species, with 7 to 10 days between broods during the peak emergence period with little emergence activity in between, and that the subimagoes emerge during the night and very early morning.

To me, this sounds like a very difficult emergence to hit just right, but sure hope you will share your attempts with us.

Best regards,
Roger Rohrbeck
www.FlyfishingEntomology.com

Curtis
Posts: 2

Curtis on Feb 28, 2011February 28th, 2011, 9:35 am EST

Roger:
Since this original post I have recorded some more observations. I have a spreadsheet that I can up load to you, if you wish. You can e-mail me at: cduffield@greenwayelecsvc.com.

Taxon

Site Editor
Plano, TX

Posts: 1311

Taxon on Feb 28, 2011February 28th, 2011, 5:55 pm EST

Hi Curtis-

Got your spreadsheet, which documents Hexagenia orlando emergence on a specific Florida lake over a multi-year period. Thanks for sharing.

Best regards,
Roger Rohrbeck
www.FlyfishingEntomology.com

Jmd123

Oscoda, MI

Posts: 2474

Jmd123 on Mar 1, 2011March 1st, 2011, 6:25 am EST

One of the fly fishing magazines had an article on warmwater fly fishing destinations near Orlando a few years ago - don't remember which one. The idea was places to go while you and your family are visiting Disneyland. Hmmmmm, bass & big sunfish on a Hex hatch...sign me up! Sounds especially good during early March in Michigan! Those redbreast sunnies put up a good fight on the long rod - I caught lots of them while living in Georgia and Texas. Can't even imagine what a Florida bluegill feels like - "freshwater permit"!

Jonathon

No matter how big the one you just caught is, there's always a bigger one out there somewhere...