Your quick guide to identifying butterflies in the Northeast At the park, in the garden or on a walk, keep this tabbed booklet close at hand. Based on Jaret C. Daniels' best-selling butterfly field guides, Butterflies of the Northeast features only species seen in Connecticut, Delaware, Maine, Maryland, Massachusetts, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, and Vermont. It is organized by color for quick and easy identification. Narrow your choices by color, and view just a few butterflies at a time. The easy-to-use format and detailed photographs, with key markings of more than 100 species, help to ensure positive ID for even casual observers. The pocket-sized format is much easier to use than laminated foldouts, and the tear-resistant pages help to make the book durable in the field.