The SongBird Purple Martin Magnet - Bird Caller is a great way to get birds to enjoy your yard. This magnet mimics bird calls.For any bird lover looking to attract more to your feeding stations and nest boxes this is the calling bird you need. This Songbird magnet calls beautiful and charming Eastern Bluebirds, Baltimore Orioles, House Wrens, House Finches, American Goldfinches and Indigo Buntings. The calling reproduces the delightful songs of these birds, letting them know their kind is thriving and bringing them into your birdhouses and feeding stations. This magnet can also entice useful and widely-loved Purple Martins to nest together and return to your house year after year. Purple Martins are insect-eating birds who will keep your backyard pest free. The magnet mimics the Purple Martin dawn song, inviting new arrivals and passing Martins to make their home in your Purple Martin house.