John Shaw / Purple gallinule (Porphyrio martinicus) reaches for giant bulrush (Schoenoplectis californicus) seeds. Wakodahatchee Wetlands, Florida, USA, April.

Tony Heald / Asian elephant (Elephas maximus) mother and baby domesticated elephants in water, Bandhavgarh National Park, India. March.

Cyril Ruoso / Sumatran orangutan (Pongo abelii) baby reaching up to mother's hand, Gunung Leuser National Park, Sumatra, Indonesia.

Cyril Ruoso / Keeper feeding Common woolly monkeys (Lagothrix lagotricha) in Ikamaperou Sanctuary, Amazon, Peru. October 2006.

Cyril Ruoso / Common woolly monkey (Lagothrix lagotricha) reaching forward, Ikamaperou Sanctuary, Amazon, Peru.

Ole Jorgen Liodden / Arctic fox (Alopex lagopus lagopus) grooming in summer fur, Spitsberg, Svalbard, Norway, August.

Jack Dykinga / Saguaro cactus (Carnegiea gigantea) in flower at night, with The Milky Way behind, Sonoran Desert National Monument, Sierra Estrella Mountain Wilderness, Arizona, USA, May.

Jack Dykinga / Saguaro cactus (Carnegiea gigantea) in flower at night, with The Milky Way behind, Sonoran Desert National Monument, Sierra Estrella Mountain Wilderness, Arizona, USA, May.

Dong Lei / Mrs Gould's sunbird (Aethopyga gouldiae dabryii) male feeding from Chinese wild peach flowers (Prunus davidiana) Kawakarpo Mountain, Meri Snow Mountain National Park, Yunnan Province, China. May.

Dong Lei / Mrs Gould's sunbird (Aethopyga gouldiae dabryii) male hanging upside down and feeding from Chinese wild peach (Prunus davidiana) male blossom, Kawakarpo Mountain, Meri Snow Mountain National Park, Yun...

Theo Webb / Bonobo (Pan paniscus) baby sitting next to its mother, Max Planck research site, LuiKotale, Salonga National Park, Democratic Republic of Congo.

Andy Rouse / Red squirrel (Sciurus vulgaris) reaching upwards, UK. Captive.