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Photo#175687
Fork-tailed Fly - Callibaetis pictus

Fork-tailed Fly - Callibaetis pictus
Irvine Regional Park, Orange County, California, USA
April 6, 2008
Size: 0.7cm
On wall

Moved

Callibaetis
This is probably a dark female subimago of C. pictus. (See comments here.)

Moved
Moved from Mayflies.

Baetidae
Your specimen appears to match this specimen quite well. The small hindwings of Kay's specimen are clearly that of a baetid, so placement in Baetidae seems safe.

Baetid (?)
The area where the hindwings (if present) would be located on this female subimago is unclear. However, this specimen does not appear to have "normal" hindwings. Despite the indistinct image, the very dark color of this specimen and the interesting abdominal markings might make further identification possible.

Mayfly
This is a mayfly, order Ephemeroptera. See here.

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