ナショナルジオグラフィックのインスタグラム(natgeo) - 4月6日 09時01分

Photo by @tbfrost | Gelada monkeys have the most complex vocal repertoire of all primates. But they also use their faces to communicate . In this case a bachelor male is flashing his teeth and raising his eye brows to threaten another adult male gelada that is nearby. Unpublished photo from story in the current issue of nat geo co-shot by @jtkerby Follow me at @tbfrost for more photos from my work with wildlife.

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