white Mayfly - Hexagenia

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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Mayflies (Ephemeroptera) » Furcatergalia » Scapphodonta » Ephemeroidea » Common Burrower Mayflies (Ephemeridae) » Hexagenia

Photo#1693003

Copyright © 2019 Ilze V-G.

white Mayfly - Hexagenia -

North Bay, Ontario, Canada
July 14, 2019
Size: appr 2.5 cm body

I was surprised to see white Mayflies amongst darker ones!!
There were hundreds of Mayflies on the back wall of the Eagle's Nest Gas Bar on Migizii Miikan Rd in North Bay. (I understand that it's an annual occurrence that fishermen love and that even T-shirts celebrating the Mayfly get printed!)

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Contributed by Ilze V-G. on 14 July, 2019 - 2:16pm
Last updated 14 July, 2019 - 6:43pm

Moved

Moved from Mayflies.

… Roger Rohrbeck, 14 July, 2019 - 5:56pm

Female how

Can one tell it is a female ?

… Ilze V-G., 14 July, 2019 - 6:49pm

Sex Determination

Ilze-

The most obvious way to determine the sex of a winged mayfly (subimago or imago) is to look for claspers sticking out of the posterior end of the abdomen. Females will be absent claspers, and males will have them.

… Roger Rohrbeck, 15 July, 2019 - 6:31pm

Like a dragonfly then,

Thank you Roger.

… Ilze V-G., 15 July, 2019 - 7:24pm

Hexagenia

Hi Ilze-

I believe this female imago to be of genus Hexagenia.

… Roger Rohrbeck, 14 July, 2019 - 5:55pm

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