A concise field manual for identifying common North American butterflies, presenting 295 colored figures that depict 255 species and varieties alongside succinct descriptions of wing patterns, sizes, ranges, and habits. The text opens with accessible explanations of butterfly anatomy, classification, and life history, then provides practical, field-oriented identification guidance, often illustrating only a single wing side or half when adequate. Emphasis is on clear visual comparison, terminology, and observation tips to assist naturalists and beginners in recognizing and distinguishing species across the United States and Canada.