Today in the News and Observer online newspaper there was a great article talking about the bird calling apps that people have downloaded onto their phones. They say that people use the app calls to "flush out species for better viewing and photography".
Just becareful if you do decide to do birdwatching this way because a Seattle based wildlife recording expert said, "I've seen woodpeckers respond to playback from birders ... and a sharp-shinned hawk comes and takes the bird out".
Let's leave mother nature to her own devices and leave our devices in our pockets when we are in nature.
