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Artistic view of a Male Pteronarcys californica (Pteronarcyidae) (Giant Salmonfly) Stonefly Adult from the Gallatin River in Montana
Salmonflies
Pteronarcys californica

The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.

Artistic view of a Perlodidae (Springflies and Yellow Stones) Stonefly Nymph from the Yakima River in Washington
This one seems to lead to Couplet 35 of the Key to Genera of Perlodidae Nymphs and the genus Isoperla, but I'm skeptical that's correct based on the general look. I need to get it under the microscope to review several choices in the key, and it'll probably end up a different Perlodidae.
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.
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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

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
Taxon's profile picture
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
Taxon's profile picture
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
Jmd123's profile picture
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...

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