^Paul A. Opler (1998). A Field Guide to Eastern ButterfliesISBN 9780395904534 (revised Dec 2015)
^Peterson Field Guides: A Field Guide to Eastern Butterflies Vol. 2 by Paul A. Opler and Mariner Books Staff (1998, Paperback)ISBN 9780395904534 (revised Jun 2019)
^Opler, Paul A. (2014). A Field Guide to Eastern Butterflies, Houghton Mifflin Harcourt. BiggerBooks. ISBN 9780395904534 (revised Nov 2023)