Lepidopterists' Society FAQ
https://www.lepsoc.org/content/frequently-asked-questions
What's the difference between a moth and a butterfly? Why are moths attracted to light? This FAQ has the answers.

National Moth Week
http://nationalmothweek.org
This global citizen scientist organization promotes moth appreciation. Check their website for moth-related events happening in your area, especially during the annual National Moth Week in July.

David Beadle and Seabrooke Leckie, Peterson Field Guide to Moths of Northeastern North America, Houghton Mifflin Harcourt, 2012, ISBN 978-0547238487
This beautiful new book covers all the groups of moths found in northeastern North America, including the many groups of microlepidoptera. Unique in depicting the moths in their natural resting positions. Diagrams showing flight periods, distribution maps, and size. A wonderful resource.

Louis Handfield, Le guide des papillons du Québec - Nouvelle edition, Broquet, 2011, ISBN 978-2-89654-245-1
This book is the most comprehensive resource for identifying butterflies and moths in the Ottawa area. The colour plates are excellent, and the species are listed by Hodges number. The colour plates in the new edition are even better than the ones in the first edition (1999). Invaluable. Don't worry if your french is rusty (or non-existent); it contains a short chapter in english explaining how to understand the most important data.

Charles Covell, A Field Guide to Moths of Eastern North America, 2nd edition, Virginia Museum of Natural History, 2005, ISBN 1884549217)
The second edition of the classic Peterson's Guide.

Rick Cavasin's Ontario Butterflies
http://www.ontariobutterflies.ca/
Rick is a good friend and collaborator also based in Ottawa who building a great collection of pictures of butterflies in south and eastern Ontario and western Quebec.

North American Moth Photographers Group
http://mothphotographersgroup.msstate.edu/MainMenu.shtml
Another great resource for identifying north american moths.

Joseph Scheer, Night Visions: The Secret Designs of Moths, Prestel Publishing, 2003, ISBN 3791329685
I collected butterflies and moths as a kid. My interest in local moths was rekindled by Joseph Scheer's Moths of Allegany County project, which was featured in the May 2002 issue of National Geographic Magazine and a 2011 article in the journal Insects. As well as exhibiting his prints worldwide, his project led to this wonderful book. I employ similar techniques to his.

David L. Wagner, Dale F. Schweitzer, J. Bolling Sullivan & Richard C. Reardon, Owlet Caterpillars of Eastern North America, Princeton University Press, 2012, ISBN 9781400838295)
Lavishly illustrated with pictures of both the caterpillars and their moths. Out-of-print.

David L. Wagner, Caterpillars of Eastern North America: A Guide to Identification and Natural History, Princeton University Press, 2005, ISBN 1884549217)
Lavishly illustrated with pictures of both the caterpillars and their moths.

Butterflies In Your Playground
http://www.playgroundequipment.com/butterflies-in-your-playground/
Fun resources for kids to learn about butterflies.