): The Birds of North America 715. Academy of Natural Sciences, Philadelphia, PA & American Ornithologists' Union, Washington, D.C. Online version, retrieved 2006-11-27.
"The Birds of North America" volume 715 was published by the Academy of Natural Sciences in Philadelphia and the American Ornithologists' Union in Washington, D.C., and is available online. It was accessed on November 27, 2006.