The predilection for vases in figural form continued throughout the fifth century B.C. During the middle of the century, the workshop of the Sotades Painter was the most active and creative source. Whereas head vases, occasionally with two heads conjoined, were popular in the 490s and 480s, the next generation of artists introduced the conceit of combining the heads of different animals, in this case, a donkey and a ram. The painted scene probably showed a satyr and a maenad.
Perhaps from Numana
Beazley, John D. 1963. Attic Red-figure Vase-painters, Vols. 1 and 2, 2nd ed. pp. 767, 1669, no. 20, Add. 1, pp. 765-68, Oxford: Clarendon Press.
Calder, Louise. 2011. Cruelty and Sentimentality: Greek Attitudes to Animals, 600-300 BC. no. 45, 105, pp. 32, 49, 170, 177, Oxford: Archaeopress.