Anthropology Colloquium: Dr. Alexandra Kralick

Sexually mature male orangutans come in two forms: flanged males, with broad cheek pads and a throat pouch, and unflanged males, who delay these secondary sex characteristics. Early accounts cast unflanged males as stress-induced alternatives that “sneak” as “female-sized” and force matings. In this talk, I turn to the skeleton to ask whether those early descriptions hold up. I assign flanging status using an osteobiographic method and present an unexpected pattern.