Cyril Ruoso / Man with Chamec spider monkeys (Ateles chamek) holding onto him as he walks through sanctuary. Ikamaperou Sanctuary, Amazon, Peru. October 2006.

Staffan Widstrand / Wild Wonders of China / Portrait of a Golden snub-nosed monkey (Rhinopithecus roxellana) screaming and showing its teeth, Foping Nature Reserve, Shaanxi, China. Endangered species

Staffan Widstrand / Wild Wonders of China / Portrait of a Golden snub-nosed monkey (Rhinopithecus roxellana) screaming and showing its teeth in Foping Nature Reserve, Shaanxi, China. Endangered species

Staffan Widstrand / Wild Wonders of China / Portrait of a Golden snub-nosed monkey (Rhinopithecus roxellana) screaming, showing its teeth in Foping Nature Reserve, Shaanxi, China. Endangered species

Jane Burton / Domestic Cat, immediately after penetration red burmese male 'Ozzie' leaps away from female tabby 'Dainty' as she screeches and turns to lash out at him, mating sequence 6/7

Robin Chittenden / Black-headed gull (Chroicocephalus ridibundus) in confrontation with Coot (Fulica atrica) whilst swimming, Whitlingham Country Park, Norfolk, UK. December.

Roland Seitre / North African ostrich (Struthio camelus camelus) male head and neck close up, calling, Sharjah, UAE. Captive IUCN: Critical.

Roland Seitre / North African ostrich (Struthio camelus camelus) male head and neck close up, calling, Sharjah, UAE. Captive IUCN: Critical.

Roland Seitre / Male North African ostrich (Struthio camelus camelus) calling, Sharjah, UAE. Captive IUCN: Critical.