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Unknown Butterfly - Erynnis brizo

Unknown Butterfly - Erynnis brizo
Grindstone Dam, Ruidoso, Lincoln County, New Mexico, USA
April 8, 2014
I have a hard time with the Duskywings it seems. They always turn out to be Mournfuls but maybe this one is different. Possibly E. brizo or E. icelus?

In any case I would appreciate an ID.
TIA - - -

Moved from Duskywings.

Moved from ID Request.

Definitely either brizo or icelus. I lean towards brizo, but I have a hard time distinguishing images of these two. Best way to tell them apart is habitat. Brizo is found in oak woodlands while icelus is found with aspens or willows, poplars or birch.

After looking in several books and noting the flight season, location, environment and wing patterns I believe this is a Sleepy Duskywing - Erynnis brizo. Would welcome correction if anyone thinks different.

Thank you very much for the help.

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