Moths shown here represent a collage of Spring Quakers, Woodlings, Woodgrains and Large Arches, all of which are placed in the Family Noctuidae and the Subfamily Noctuinae. I reckon these images may represent 14 genera and 16 species that are commonly observed in northeastern North Dakota and northwestern Minnesota.
A few of these Noctuid moths are particularly challenging to identify! See if you can identify a few of these moths by matching them with images found on pages 480-493 of the Peterson Field Guide to Moths of Northeastern North America.
Click on this link to the Moth Photographers Guide to find excellent photographs many, many other North American species of Spring Quakers, Woodlings, Woodgrains, and Large Arches: http://mothphotographersgroup.msstate.edu/fast.php?plate=63.0&size=l&sort=p
Dakota Naturalist 