Karl Ammann / Orang utan baby 'kissing' mother, Borneo

Karl Ammann / Silhouette of African elephants at sunset {Loxodonta africana} Kenya

Karl Ammann / African elephant portrait in grass {Loxodonta africana} with Egret, Kenya

Karl Ammann / African elephant herd walking {Loxodonta africana} Amboseli, Kenya

Karl Ammann / African elephants crossing river {Loxodonta africana} with Giraffes in forest behind. Kenya

Karl Ammann / Silhouette of African elephants in heat haze {Loxodonta africana} Amboseli,

Karl Ammann / Young Chimpanzees using grass stems to extract termites from mound {Pan troglodytes} in sanctuary, Kenya

Karl Ammann / Hunter with smoked carcass of silverback Gorilla {Gorilla gorilla} for food, Cameroon

Karl Ammann / Young Chimpanzees 'kissing' {Pan troglodytes} Chimfunshi sanctuary, Zambia

Karl Ammann / Bonobo family mutual grooming, Wamba, Zaire

Karl Ammann / Chimpanzee swinging through trees at Chimfunshi sanctuary, Zambia

Karl Ammann / Bonobo {Pan paniscus} Brazzaville sanctuary, Democratic Republic of Congo.