Header image
Enter a name
Lateral view of a Female Hexagenia limbata (Ephemeridae) (Hex) Mayfly Dun from the Namekagon River in Wisconsin
Hex Mayflies
Hexagenia limbata

The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.

Dorsal view of a Neoleptophlebia (Leptophlebiidae) Mayfly Nymph from the Yakima River in Washington
Some characteristics from the microscope images for the tentative species id: The postero-lateral projections are found only on segment 9, not segment 8. Based on the key in Jacobus et al. (2014), it appears to key to Neoleptophlebia adoptiva or Neoleptophlebia heteronea, same as this specimen with pretty different abdominal markings. However, distinguishing between those calls for comparing the lengths of the second and third segment of the labial palp, and this one (like the other one) only seems to have two segments. So I'm stuck on them both. It's likely that the fact that they're immature nymphs stymies identification in some important way.
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.

Male Baetis tricaudatus (Blue-Winged Olive) Mayfly Dun Pictures

This male was associated with a female of the same species.

Dorsal view of a Male Baetis tricaudatus (Baetidae) (Blue-Winged Olive) Mayfly Dun from Owasco Inlet in New York
Male Baetis tricaudatus (Baetidae) (Blue-Winged Olive) Mayfly Dun from Owasco Inlet in New York
Male Baetis tricaudatus (Baetidae) (Blue-Winged Olive) Mayfly Dun from Owasco Inlet in New York
Ventral view of a Male Baetis tricaudatus (Baetidae) (Blue-Winged Olive) Mayfly Dun from Owasco Inlet in New York
Male Baetis tricaudatus (Baetidae) (Blue-Winged Olive) Mayfly Dun from Owasco Inlet in New York
Lateral view of a Male Baetis tricaudatus (Baetidae) (Blue-Winged Olive) Mayfly Dun from Owasco Inlet in New York
Male Baetis tricaudatus (Baetidae) (Blue-Winged Olive) Mayfly Dun from Owasco Inlet in New York
Ruler view of a Male Baetis tricaudatus (Baetidae) (Blue-Winged Olive) Mayfly Dun from Owasco Inlet in New York The smallest ruler marks are 1 mm.

This mayfly was collected from Owasco Inlet in New York on April 3rd, 2007 and added to Troutnut.com by Troutnut on April 3rd, 2007.


Start a Discussion of Dun

References

Male Baetis tricaudatus (Blue-Winged Olive) Mayfly Dun Pictures

Collection details
Location: Owasco Inlet, New York
Date: April 3rd, 2007
Added to site: April 3rd, 2007
Author: Troutnut
Troutnut.com is copyright © 2004-2024 (email Jason). privacy policy