My reference guide of choice is Birds of Atlantic Canada by Roger Burrows. I keep this handy reference close for identification and information. The pages contain beautiful illustrations of each bird.The ISBN for the book is 978-1-55105-353-0. It retails for $29.95.
Although the illustrations in the book are extremely detailed, I usually search for photographs on the web when identifying, particularly when birds have similar markings and colouring. Wiki books has reference guide called Field Guide/Birds/Eastern US and Canada that is most helpful.
