Context, Structural Variability and Distinctiveness of California Towhee ( Pipilo crissalis) Vocal Duets.Published in:Ethology, 2009, v. 115, n. 1, p. 77, doi. 10.1111/j.1439-0310.2008.01583.xBy:Benedict, Lauryn;McEntee, Jay P.Publication type:Article