Checklist of Ontario Butterflies, 2012.  Jones, C.D. ,  Hamilton Naturalists Club, Ontario Ministry of Natural Resources & Ontario Nature.   ( available from  The Hamilton Naturalists Club )

The Butterflies of Canada, 1998. Layberry, R.A., P.W. Hall, J.D. Lafontaine, University of Toronto Press, Toronto.

Butterflies of the Ottawa District, 1982.  Layberry, R.A., J.D. Lafontaine and P.W. Hall.  Trail and Landscape 16(1): 3-59.

Checklist of the Butterflies of the Ottawa District, 1996. P. Hall,  R. Layberry,  D. Lafontaine, The Ottawa Field-Naturalists' Club, Ottawa.

Butterflies of the Ottawa District: 103 species...and counting, 2007.  Layberry, R.A..  Trail and Landscape 41(1): 16-36.

Photo Field Guide to the Butterflies of Southern Ontario, 2003.  Ian Carmichael and Ann Vance, St. Thomas Field Naturalists Club, St. Thomas, ON.

A Catalogue of the Butterflies of the United States and Canada, 2008. Jonathan Pelham, The Journal of Research on the Lepidoptera, Vol. 40.

Le Guide des Papillons du Québec, 1999. Louis Handfield, Broquet, Ottawa.

Papillons et Chenilles du Québec et des Maritimes, 2012. Michel Leboeuf and Stéphane Le Tirant, Éditions Michel Quintin, Waterloo ( Québec ).

Field Guide to Butterflies of North America, 2003.  Brock, Jim P. and Kenn Kaufman, Houghton Mifflin, New York.

Butterflies of the East Coast: An Observer's Guide, 2005.  Rick Cech and Guy Tudor, Princeton University Press, Princeton and Oxford.

The Butterflies of North America: A Natural History and Field Guide, 1986.  Scott, James A., Stanford University Press, Stanford, California.