And I thought I had heard of all the mythological creatures....
An hippalectryon (or hippalektryon, from Greek ἱππαλεκτρυών) is a type of fantastic hybrid creature of the Ancient Greek folklore, half-horse and half-chanticleer, with yellow feathers. The cockerel half sports wings, the tail and the hind legs.
The oldest representation currently known dates back from the 9th century BCE, and the motive grows most common in the 6th century, notably on vase painting and sometimes as statues, often shown with a rider. It is also featured on some pieces of currency. A few literary works of the 5th century mention the beast, though no mythoi related to it are currently known.
http://en.wikipedia.org/wiki/Hippalectryon
The oldest representation currently known dates back from the 9th century BCE, and the motive grows most common in the 6th century, notably on vase painting and sometimes as statues, often shown with a rider. It is also featured on some pieces of currency. A few literary works of the 5th century mention the beast, though no mythoi related to it are currently known.
http://en.wikipedia.org/wiki/Hippalectryon