Bence Mate / Grey herons (Ardea cinerea) on lake at twilight, Hungary.

Bence Mate / Roe deer (Capreolus capreolus) silhouetted at dusk, with cresent moon behind, Hungary.

Will Burrard-Lucas / Yellow-billed stork (Mycteria ibis) colony silhouetted at dusk South Luangwa National Park, Zambia. May.

Will Burrard-Lucas / Yellow-billed stork (Mycteria ibis) colony silhouetted at dusk, South Luangwa National Park, Zambia. May.

Shattil & Rozinski / Great horned owl (Bubo virginianus) perched on top of a lamp post, Colorado, USA, January.

Roland Seitre / Western grey kangaroo (Macropus fuliginosus) silhouetted whilst jumping, Australia.