Explore 120 of the most common birds of Eastern and Central North America. This puzzle has them all from the majestic Bald Eagle to the elegant Sandhill Crane. Learn more about these birds with a poster sized bird key inside that has a QR code links to all the birds songs, as well as their dimensions and Latin names. This puzzle is a perfect way to explore the bird life that surrounds you. This puzzle comes with an informational poster! The Cornell Lab of Ornithology has developed QR codes which allow you to listen to the songs and calls of hundreds of birds, right from your smart phone. We have harnessed this educational technology to allow you to hear these birds sing while completing your puzzle. The QR codes are on the informational poster inside. Just download the free Bird QR app and scan the QR codes next to each bird to hear it sing. It’s an interactive way to combine today’s technology with traditional puzzle fun. 1000 Piece Jigsaw Puzzle Finished Puzzle Size: 19.