Mayfly

I am very late for the party

Based on Bold samples it looks like Heptagenia pulla. pulla has a lot of maculation variation but typical samples align with this one.

… The Stenonema Rangers of Ontario, 2 March, 2020 - 12:33am

Geography Problem!

Mack-

Heptagenia pulla is not known to reside in WA.

… Roger Rohrbeck, 2 March, 2020 - 12:05pm

your right Roger

i meant Heptagenia elegantula based on the synonym, H diabasia, now Heptagenia elegantula. i am going too revisit tonight.

… The Stenonema Rangers of Ontario, 2 March, 2020 - 12:15pm

Moved

Moved from Mayflies.

… Roger Rohrbeck, 5 July, 2012 - 5:42pm

Heptageniid

Hi John-

I believe this to be a female subimago of family Heptageniidae, and perhaps of genus Epeorus or Heptagenia.

… Roger Rohrbeck, 5 July, 2012 - 5:40pm

Thanks, the color pattern doe

Thanks, the color pattern does not seem to match the other Mayflies, however, that just seems to be the case with most of the Mayflies.

… John Barry, 6 July, 2012 - 11:51am

Size?

John-

Can you estimate body length in mm from front of head to end of abdomen, not including tails?

… Roger Rohrbeck, 8 July, 2012 - 10:12pm

Tha t is tough to say. This

Tha t is tough to say. This was a larger mayfly maybe about 10mm. It is on an Alder leaf if that is any help.

… John Barry, 8 July, 2012 - 10:27pm

I take that back.

I take that back. It is not an alder tree. I have another photo that is not cropped and shows more of the surrounding area so that you can get a persepctive. Would you like me to attache that one? Also it was likely somewhat longer than 10 mm.

… John Barry, 8 July, 2012 - 10:31pm

Location

Hi John,

Please email me, FlyfishingEntomology@comcast.net. I would very much like to further explore the identification of this mayfly in late June or early July, but would need some very explicit directions to the location of the rock island in Wallace Falls State Park, where you photographed it. My plan would be to do some sampling in the immediate vicinity of the rock island, in hope of being able to collect a mature nymph, which might reasonably be associated with the subimago you photographed.

Thanks,
Roger Rohrbeck
Mercer Island, WA

… Roger Rohrbeck, 16 December, 2012 - 8:39pm

Shelter vs. Food

Hi John,

Winged mayflies do not have functioning mouthparts, so they not able to eat, or even to take in liquids. So, in order to conserve the fluids they already possess for long enough to mate, and for the female to oviposit, they seek shade offered by streamside or lakeside vegetation. In other words, unlike many terrestrial insects, mayflies are not attracted to a particular tree or plant by the food or liquid it may offer.

… Roger Rohrbeck, 20 July, 2012 - 1:23am

Moved for expert attention

Moved from ID Request.

… Ken Wolgemuth, 5 July, 2012 - 5:05am