The Greek goddess, Athena ( and her Roman counterpart, Minerva) is always pictured in art and decorative work with a little owl, the symbol for wisdom, shrewdness, & intellect and the patron animal of Athens.
Fun fact: a group of owls is called a parliament.
oxidized sterling silver owls on a crescent moon ring w/ 14k gold band
crescent approx. 1/2" across