Field guides for young naturalists backyard birds series is designed with the beginner in mind. Features the original art of celebrated naturalist roger tory Peterson; incorporates the Peterson identification system, the most effective method for bird identification; and uses a straightforward design. This series makes field guides accessible and appealing to children. Paperback; 48 pages trim. Age range: 8-12 years, grade range grades 4-6. Measures 5-inch width by 8.5-inch length.