Anup Shah / Olive Baboon (Papio anubis) male with three month old young, Gombe National Park, Tanzania

Anup Shah / Olive Baboon (Papio anubis) curious male investigating camera, Masai Mara, Kenya

Ingo Arndt / Adult male Gelada baboon, Simien Mt NP, Ethiopia {Theropithecus gelada}

Ingo Arndt / Gelada baboon group feeding at top of ridge, Simien Mt NP, Ethiopia {Theropithecus gelada}

Ingo Arndt / Adult male Gelada baboon, Simien Mt NP, Ethiopia {Theropithecus gelada}

Ingo Arndt / Gelada baboon male running, Simien Mt NP, Ethiopia {Theropithecus gelada}

Ingo Arndt / Gelada baboon males fighting, Simien Mt NP, Ethiopia {Theropithecus gelada}

Ingo Arndt / Hamadryas baboons grooming one another {Papio hamadryas} Africa

Ingo Arndt / Hamadryas baboon male threat display {Papio hamadryas} Africa

Ingo Arndt / Gelada baboon subadult males grooming {Theropithecus gelada} Simien Mt NP, Ethiopia

Ingo Arndt / Gelada baboon male portrait {Theropithecus gelada} Simien Mt NP, Ethiopia

Ingo Arndt / Gelada baboon {Theropithecus gelada} juveniles playing on rocks, Simien Mountains NP, Ethiopia