They have the legs, hooves, horns of goat and the torso and head of a man.
Fauns are said to be the guardians of the woods and fields.
The faun is a half human–half goat (from the head to the waist being human, but with the addition of goat horns) manifestation of forest and animal spirits that would help or hinder humans at whim. Romans believed fauns inspired fear in men traveling in lonely, remote or wild places. They were also capable of guiding humans in need, as in the fable of The Satyr and the Traveller, in the title of which Latin authors substituted the word Faunus. Fauns and satyrs were originally quite different creatures: whereas fauns are half-man and half-goat, satyrs originally were depicted as stocky, hairy, ugly dwarfs or woodwoses with the ears and tails of horses or asses. Satyrs also were more woman-loving than fauns, and fauns were rather foolish where satyrs had more knowledge.
Ancient Roman mythological belief also included a god named Faunus and a goddess named Fauna who were goat people.