6 miles NW Lyons, Boulder County, Colorado, USA April 30, 2007 Size: BL ~16 mm
This mayfly was photographed here in the foothills at about 6400' at the end of April. It was resting on a large water tank several hundred feet uphill from a small creek. Wing venation is very different from Baetidae. Any help with its ID is greatly appreciated.
Contributed by Lynn Monroe on 8 April, 2015 - 10:08am Last updated 30 April, 2015 - 3:32am
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