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Photo#114455
small mayfly - female

small mayfly - Female
Groton, Middlesex County, Massachusetts, USA
May 29, 2007
Size: ~5mm

Moved
Moved from Mayflies.

Baetidae
I can't see any hindwings on this one, not even on the larger image on your other site. However, that doesn't necessarily mean they are not there. Some baetids have very tiny threadlike hindwings, and a few lack hindwings in only one sex.

This looks very similar to your other specimen (here) and Andrew's specimen (here). They might be the something like Procloeon. (That is just a guess, not a placement suggestion.)

Nice!
I don't see many mayflies, unfortunately...
This here is not only a female, but if you look behind it, that black lumpy sphere is a recently deposited egg mass.
She probably is resting... after reproducing mayflies die. Adult lifespans measure from half and hour to 24 hrs.
http://en.wikipedia.org/wiki/Mayfly#Adult

 
Too bad for the eggs
She laid them on the side of the house under the porch light. Not much chance they'll survive since there's no water around them.

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