Walnut Underwing from Mount Washington

Thursday, July 16, 2009
Last night, when we returned home from dinner, this Underwing Moth tried to fly into the livingroom.  We shushed it back outside, and this morning, it was still on the screen door.  We believe this is the Walnut Underwing, Catocala piatrix, which BugGuide identifies as the Penitent.
BugGuide identifies it as an eastern species, but also indicates a sighting from Arizona.  Charles Hogue describes it as a local species in his Insects of the Los Angeles Basin.  We generally sight one or two individuals each summer.

Walnut Underwing
Walnut Underwing

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