Pascal Pittorino / Przewalski's horse (Equus ferus przewalski) head portrait, captive, Lozere, France, December.
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Anup Shah / Mountain gorilla portrait (Gorilla beringei) pensive male, Parc des Volcans National Park, Rwanda
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Will Burrard-Lucas / Western lowland gorilla (Gorilla gorilla gorilla) sitting, looking up in lowland forest, Odzala National Park, Republic of Congo. April.
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Jen Guyton / Chacma baboon (Papio ursinus) portrait, uKhahlamba-Drakensberg World Heritage Site, South Africa.
Mark Taylor / RF- Head portrait of Bulldog puppy with chin on paws. (This image may be licensed either as rights managed or royalty free.)
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Anup Shah / Eastern chimpanzee (Pan troglodytes schweinfurtheii) female 'Fanni' aged 30 years head and shoulders portrait. Gombe National Park, Tanzania.
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Anup Shah / Eastern chimpanzee (Pan troglodytes schweinfurtheii) male 'Faustino' aged 22 years resting on a fallen branch. Gombe National Park, Tanzania.
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Anup Shah / Eastern chimpanzee (Pan troglodytes schweinfurtheii) adolescent female 'Glitter' aged 13 years head and shoulders portrait. Gombe National Park, Tanzania.
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Roland Seitre / Purple-necked rock-wallaby (Petrogale purpureicollis) on rock, Australia.
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Suzi Eszterhas / Mountain Gorilla (Gorilla gorilla beringei) mother holding baby twins age five months, Parc National des Volcans, Rwanda. Endangered species
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Fiona Rogers / Sumatran orangutan (Pongo abelii) female baby 'Sumi' aged 2-3 years portrait. Gunung Leuser National Park, Sumatra, Indonesia. Apr 2012. Rehabilitated and released (or descended from those which were...