Pales was initially a male god who assumed a female form and became protectress of the flocks. Her festival, the Palila, was celebrated on April 21, the day of the foundation of Rome, during which animals under her care were purified. A.G.H.
Grimal, Pierre, Larousse World Mythology, Secaucus, New Jersey, Chartwell Books, 1965, p. 180
Jordan, Michael, Encyclopedia of Gods, New York, Facts On File, Inc. 1993, p. 199