Female Baetidae (Blue-Winged Olives) Mayfly Spinner Pictures

Mayflies

Caddisflies

Stoneflies

Classification

Kingdom Animalia (Animals)

» Phylum Arthropoda (Arthropods)

» Class Insecta (Insects)

» Order Ephemeroptera (Mayflies)

» Family Baetidae (Blue-Winged Olives)

This species is probably in Centroptilum, Cloeon, or Procloeon. I captured this spinner on the same night as a dun which is probably of the same species.

This mayfly was collected from the West Branch of Owego Creek on August 9th, 2006 and added to Troutnut.com on August 11th, 2006.

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Female Baetidae (Blue-Winged Olives) Mayfly Spinner from the West Branch of Owego Creek in New York

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This picture shows the shape of the costal process on the hind wing pretty well.

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This false-color image of the clear wings shows all the veins.

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Recent Discussions of this Spinner

No Help

Posted by Taxon on Aug 11, 2006

Jason-

The single detached intercalaries in the fore wing would limit the choices to the genera you suggest. The sharply pointed costal projection and single longitudinal vein in the hind wing probably narrow it to a single species. Unfortunately, none of the Baetidae hind wing illustrations to which I have access show either that sharply pointed of a projection or the single longitudinal vein, let alone in combination with one another.

Reply Anyone want to weigh on on the ID here?

Posted by Troutnut on Aug 11, 2006

I can't follow the key in Merritt & Cummins very far since it's not a male spinner. The sharp costal process could be a good hint. Anybody know which genus or species this is?

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Jargon Defined:

Dun: Mayflies have two adult stages. They first emerge from the water as duns (scientifically known as the subimago stage). They then molt into the spinner (imago) stage, in which they mate and die. Sometimes the word "dun" is confusingly used to refer to a brownish gray color in fly tying materials.

Spinner: There are two winged stages of adult mayflies. They emerge from the water as duns, molt on land (usually) into their fully mature stage, spinners. As spinners, they mate, lay eggs, and die.