The ARL logo is derived from a petroglyph of a "bird of prey" effigy holding two maces.
This glyph is part of a larger panel depicting four human and bird effigies:
- monolithic axe with woodpecker characteristics
- "bird of prey" effigy
- monolithic axe with human characteristics
- crowned mace with avian characteristics (Simek, et al. 2001)
The panel dates to the Mississippian period (A.D. 1300-1400) from the 11th
Unnamed Cave, Tennessee. The original is approximately 50 cm high.