This pocket sized and waterproofed book conveniently fits in the top pocket of your jacket or vest. Its actual size is 4" by 5" for easy storage. The secret to Flyway to Heaven is in its usability. It's durable in all weather conditions; rain, sleet, and snow. The book has well illustrated pictures of more than 35 different varieties of duck and geese. The male and female species of each waterfowl is identified by both top and bottom color schemes. Each waterfowl is also identified by body type, wing shape, feet and bill coloring, and voice characteristics. It provides a comprehensive guide to waterfowl identification.