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Photo#42993
Pepper and Salt Geometer - Biston betularia - male
Copyright © 2006 John Davis

Pepper and Salt Geometer - Biston betularia - Male
Whistle Punk Trailhead, Gifford Pinchot Nat Forest., Skamania County, Washington, USA
July 30, 2005
Attracted to lights. Biston betularia. MONA 6640. Tentative, may be another species.
Contributed by John Davis on 16 February, 2006 - 3:13pm
Last updated 13 February, 2009 - 10:07am

I agree
with this one being B. betularia. It has a fat body, and its forewing PM line has a large projecting lobe (shaped like a parabola) that seems incongruous with the line's contour - a typical feature, I think.
… Robin McLeod, 16 February, 2006 - 6:21pm

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