Dawn moves through three phases, each one represented by different bird species awakening with their unique songs. Robins warble first during Astronomical Dawn when the sun is still 18% below the horizon. This is followed by Nautical Dawn (12% below the horizon), heralded by the song of a chickadee. Finally, a towhee serenades the arrival of Civic Dawn, when the sun is 6% below the horizon and objects can be clearly seen, and on it goes as other...