Peterson first guide to butterflies and moths
by Opler, Paul A

(#35068P5)

Paperback
Houghton Mifflin, 1994

Familiar butterflies
by Walton, Richard K

(#30388G8)

Paperback
Knopf, 1990

A field guide to eastern butterflies
by Opler, Paul A

(#31379E7)

Paperback
Houghton Mifflin, 1998

A field guide to western butterflies
by Opler, Paul A

(#23517H5)

Hardcover
Houghton Mifflin, 1999

See all available formats.

Moths of Western North America
by Powell, Jerry A

(#0756EBX)

Hardcover
University of California Press, 2009