The owl was Athena's animal attribute. It figures most prominently as the device on the reverse of Athenian coinage. It also decorates a rather large group of fifth-century vases such as this one, which are known as owl skyphoi.
Hoppin, James C. and Albert Gallatin. 1926. Corpus Vasorum Antiquorum, USA 1, Hoppin and Gallatin Collections. p. 16, Gallatin pl. 26.12, Cambridge, MA: Harvard University Press.
Johnson, Franklin P. 1953. "An Owl Skyphos." Studies Presented to David Moore Robinson, vol. 2, George Emmanuel Mylonas and Doris Raymond, eds. p. 98, St. Louis: University of Washington Press.