The scientific name is Picus viridis; the first signifying a Woodpecker, and the last green.
Circe also changed Picus into a bird, when he did not respond to her advances.
The Latins named it Picus, whose brother (or double), Pilumnus, was the god of bakers and millers.
Here the story runs that Circe loved Picus, whom she met in the woods.
On the subject of Picus one may consult Ovid, Metamorph, xiv.
Picus puniceus observandus (Hartert): Crimson-winged Woodpecker.
The most important of those that remained was the prophetic ilex grove upon the Aventine hill, sacred to Faunus and Picus.
Picus mentalis humei (Hargitt): Checkered-throated Woodpecker.
And sitting on a throne was the image of King Picus, clad in royal apparel, bearing a shield on his left arm.
In the case of Mars, as well as of Picus and Faunus, the same succession is followed.