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Photo#144813
Large yellow underwing - Noctua pronuba

Large yellow underwing - Noctua pronuba
Delta, British Columbia, Canada
September 11, 2007
Size: about 1 inch
This moth and another similar were sleeping on my wall yesterday. What I was wondering about is the odd "window" on the upper back. What is that?

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Large yellow underwing - Noctua pronuba Large yellow underwing - Noctua pronuba Large yellow underwing - Noctua pronuba Large yellow underwing - Noctua pronuba Large yellow underwing - Noctua pronuba