Roland Seitre / Arabian wolf (Canis lupus arabs) running over sand. Captive, occurs in Israel, Iraq, Oman, Yemen, Jordan and Saudi Arabia.

Bence Mate / Greenfinches (Carduelis chloris) and House sparrows (Passer domesticus) blurred long exposure photograph, Hungary, February.

Erlend Haarberg / Arctic fox (Alopex lagopus) female barking. Dovrefjell-Sunndalsfjella National Park, Norway, April.

Loic Poidevin / Western marsh harrier (Circus aeruginosus) in flight, Vendee, France, May

Loic Poidevin / Western marsh harrier (Circus aeruginosus) in flight, Vendee, France, May

Fabrice Cahez / Red-billed chough, (Pyrrhocorax pyrrhocorax) flock in flight, Gorges du Tarn, France, March.

Roger Powell / European roller (Coracias garrulus) in flight. Monte da Aparica, Castro Verde, Alentejo, Portugal, May.

Staffan Widstrand / Little gull ( Larus / Hydrocoloeus minutus) Nemunas River Delta, Lithuania, May.

Staffan Widstrand / Little gull ( Larus / Hydrocoloeus minutus) Nemunas River Delta, Lithuania, May.

Staffan Widstrand / White-winged black tern (Chlidonias leucopterus) in flight, Nemunas River Delta, Lithuania, May.

Staffan Widstrand / Black-tailed godwit (Limosa limosa) in flight, Nemunas River Delta, Lithuania, May.

Robin Chittenden / Common swift (Apus apus) Lesvos, Lesbos, Greece, May.