Hanging seen from its back, turns around and spreads its legs across the branch to balance exposing its male genitals, Pileated Gibbon Hylobates pileatus, Thailand

primates monkeys animals trees swinging branches leaves twigs eating fruits hanging fruits fruitbearing tree fur nature wildlife natural habitat forests national parks thailand asia southeast asia tropical jungle rainforests montane deciduos legs vegetation stretched legs eating black endangered primate haplorhini simiiformes hylobatidae male genitals pileated gibbon hylobates pileatus sexual dimorphism habitat wildlife smuggling cambodia laos diurnal arboreal