Vincent Grafhorst / Minden / River in sandstone cave, Sof Omar Cave, Ethiopia

Vincent Grafhorst / Minden / Crater of active volcano at twilight, Erta Ale, Danakil Depression, Ethiopia

Luke Massey / Spotted hyenas (Crocuta crocuta) in urban setting at night, Harar, Ethiopia

Vincent Grafhorst / Stream in Harenna Forest, Bale Mountains National Park, Ethiopia

Vincent Grafhorst / Tree with epiphytes, Harenna Forest, Bale Mountains National Park, Ethiopia

Vincent Grafhorst / Salt flat, Lake Asale, Danakil Depression, Ethiopia

Vincent Grafhorst / Dromedary (Camelus dromedarius) caravan transporting salt across salt flat, Lake Asale, Danakil Depression, Ethiopia

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}