What animals or objects are special to Hermes?

Hermes is the great Messenger of the gods in Greek mythology as well as a guide to the Underworld. An Olympian god, he is also the patron of boundaries and of the travelers who cross them, of shepherds and cowherds, of thieves and road travelers, of orators and wit, of literature and poets, of athletics, of weights and measures, of invention, of general commerce, and of the cunning of thieves and liars. His symbols include the tortoise, the bird, the winged sandals, and the caduceus (a short herald's staff entwined by two serpents in the form of a double helix).