The faun is a half-human and half-goat mythological creature appearing in Greek and Roman mythology.
A faun, as painted by Hungarian painter Pál Szinyei Merse in 1867
Nymph and Faun (cast in lead) in the National Museum of Scotland, Edinburgh
Barberini Faun (Glyptothek, Munich) c. 200 BCE
Statue of a faun; Vatican, Brooklyn Museum Archives, Goodyear Archival Collection
In Greek mythology, a satyr, also known as a silenus or silenos, and sileni, is a male nature spirit with ears and a tail resembling those of a horse, as well as a permanent, exaggerated erection. Ear
Faun
…fauns of Roman mythology were ghosts (genii) of rustic places, lesser versions of their chief, the god Faunus. Before their conflation with Greek satyrs, they and Faunus were represented as naked men (e.g. the Barberini Faun). Later fauns became copies of the satyrs of Greek mythology, who themselves…
Satyros Cdm Paris De Ridder 509
According to M. L. West, satyrs bear similarities to figures in other Indo-European mythologies, such as the Slavic leshy (pictured) and some form of similar entity probably originated in Proto-Indo-European mythology.
The goat on the left has a short goat tail, but the Greek satyr on the right has a long horse tail, not a goat tail (Attic ceramic, 520 BC).
Detail of a krater, dating to c. 560–550 BC, showing a satyr masturbating. Athenian satyr plays were characterized as "a genre of 'hard-ons.'"