12 different bird sounds at the top of each hour! Perfect clock to hang in any room or office. Clock features 12 beautifully photographed most popular North American song birds that will sing each hour, a different bird every hour. Clock is officially licensed by the National Audubon Society. Light sensor deactivates clock when room is dark. The birds on the clock working clockwise from noon are Summer Tanager, Song Sparrow, Purple Martin, American Goldfinch, Wood Thrush, Common Yellow throat, Eastern Meadowlark, Carolina Wren, Eastern Bluebird, Red-winged Blackbird, Yellow Warbler, and finally the Hermit Thrush. Clock measures 8" in diameter and requires 3 AA batteries (not included).