Figure 1. Photograph presentation types used in the survey to test sexing and aging ability.

(A) Portrait photo of a 10.3-year male leopard showing the condition of the ears (1; score  =  9), facial scarring (2; score  =  3) and nose pigmentation (3; score  =  pink-spotted); (B) side-profile photo of a 7.5-year male showing dewlap size (4; score  =  5) (photo credits: A. Bachelor).