Line drawing of Etowah copper plate of birdman (Falcon?) dancer with barred feather cape. The figure is holding a club in one hand and a human head in the other. Note the forked-eye motif on the (sacrificed?) human head.

Moorehead, W.K. 1932. Etowah Papers. Published for the Department of Archaeology, Phillips Academy, Andover, MA, by Yale University Press, New Haven. Fig. 14