Male Maccaffertium terminatum Mayfly Spinner Pictures

 I positively identified this specimen under a microscope with a good key. It was one of the more common species in a generally light mixed bag of mayflies over a big Catskill tailwater last night.

I swooped this one out of the air while it was mating with a female, so I can be certain about her ID as well.

This mayfly was collected from the Catskills on June 7th, 2007 and added to Troutnut.com on June 8th, 2007.

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