The research team, led by Julia A. Kunz, conducted the first longitudinal analyses of behavioral changes in adult male orangutans observed in both unflanged and flanged morphs.

What are unflanged and flanged males, you ask? These terms refer to the physical development stages of male orangutans. Unflanged males lack the distinctive cheek pads (flanges) and throat pouch seen in flanged males.

#AnimalBehavior #primatology

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