It's a great way to learn to identify birds by their songs.
Every birder can be an expert at naming birds.
It's like having an ornithologist in your hip pocket. Ornithologist Milan Bull, director of the Connecticut Audubon Society, worked along with birdsong recordists Lang Elliot and Kevin Colver and award-winning illustrators Barry VanDusen and Mike DiGiorgio to create this truly innovative and elegant device. You can build a library of bird songs by purchasing additional SongCards for your collection. I personally like the CallingCard SongCard which is an ethically responsible way to bring birds to you. Simply slide in another SongCard to change bird species.