Sibley Backyard Birding Bingo is for game and bird lovers. Identifying birds as they are called sharpens observation and memory skills in new and experienced birders. Painted by world-renowned ornithologist David Sibley, the 50 quintessential North American birds bring an expert touch. This classic bingo game is fast-paced and includes ten game boards, calling cards, and bird's egg-shaped tokens. Enjoy hours of play in a sturdy, portable package.