Jussi Murtosaari / European brown bear (Ursus arctos arctos) standing on one foot, northern Finland, May.

Denis-Huot,Denis-Huot / White-backed Vulture (Gyps Africanus) feeding, Masai-Mara Game Reserve, Kenya

Igor Shpilenok,Igor Shpilenok / Kamchatka Brown Bear (Ursus arctos beringianus) stands on its back legs to more easily determine the source of an unfamiliar sound. Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Fa...

Yashpal Rathore / Kambala buffalo racing in Karnataka, India - Kane Halage race when man stands with one leg on round shaped wooden block tied to pair of buffalos with aim to splash water as high as possible to reach w...

Gabriel Rojo / Chimango caracara (Milvago chimango) standing on one foot, La Pampa, Argentina

Krista Schlyer / Whooping crane (Grus americana) International Crane Foundation, Wisconson, USA. Captive.

Markus Varesvuo / Water rail (Rallus aquaticus) on rock, Uto, Parainen, Finland August.

Hanne & Jens Eriksen / Kentish plover (Charadrius alexandrinus) male, Oman, January.

Hanne & Jens Eriksen / Pacific golden plover (Pluvialis fulva) moulting, during migration, Oman, May.

Hanne & Jens Eriksen / Demoiselle crane (Grus virgo) resting, Oman, February.

Richard Du Toit / Pied Avocet (Recurvirostra avosetta) landing with wings spread, Marievale Bird Sanctuary, South Africa, August.

Florian Möllers / White stork (Ciconia ciconia) captive, adult standing on one leg in spring meadow, Vogelpark Marlow, Germany, May.