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Here are two lepidopterans I collected in Oregon (USA). The wingspan of the bigger one (on the left) is ~4 cm. I spent a lot of time browsing this website hoping to find a match, but I didn't have success.

2 Oregon moths

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  • $\begingroup$ Out of interest, did you find these in the same place at the same time? They have fairly different phenologies... $\endgroup$
    – theforestecologist ♦
    Jan 22, 2016 at 6:23
  • $\begingroup$ @theforestecologist approximately at the same place and time. Time period 1 month, place - the same region of a town. $\endgroup$
    – Salvador Dali
    Jan 22, 2016 at 7:53

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The one on the left is a Lunate Zale Moth (Zale lunata). See Western Washington University's PNW moths page for more detailed info.

http://pnwmoths.biol.wwu.edu/browse/family-erebidae/subfamily-erebinae/tribe-omopterini/zale/zale-lunata/

The one on the right is a Forage Looper Moth (Caenurgina erechtea). See here for an image similar to the one in the question. And again take a look at Western Washington University's PNW moths page for more detailed info.

enter image description here

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