Neil Aldridge / Purple heron (Ardea purpurea) fishing at sunset, Zibadianja Lagoon, Selinda Reserve, Northern Botswana.

David Kjaer / Starling (Sturnus vulgaris) murmuration / mass gathering at winter roost, Salisbury Plain, Wiltshire, UK January

David Kjaer / Starling (Sturnus vulgaris) murmuration / mass gathering at winter roost, Salisbury Plain, Wiltshire, UK January

David Kjaer / Starling (Sturnus vulgaris) murmuration / mass gathering at winter roost, Salisbury Plain, Wiltshire, UK January

David Kjaer / Starling (Sturnus vulgaris) murmuration / mass gathering at winter roost, Salisbury Plain, Wiltshire, UK January

Neil Aldridge / Purple heron (Ardea purpurea) fishing at sunset, Zibadianja Lagoon, Selinda Reserve, Northern Botswana.

Mark Hamblin / Reindeer (Rangifer tarandus) silhouetted against sky, walking across upland, Cairngorms, Scotland, UK, August.

Mark Hamblin / Reindeer (Rangifer tarandus) group silhouetted against sky, Cairngorms, Scotland, UK, August.

Ernie Janes / Red deer (Cervus elaphus) silhouettede at sunset, Holkham Park, Norfolk, England, UK, December.

David Pattyn / European red fox (Vulpes vulpes crucigera) backlit at sunset in grass, The Netherlands. August

Mike Read / White stork (Ciconia ciconia) pair silhouetted on nest at sunset near Castro Verde, Alentejo, Portugal, February.

Ernie Janes / *** Starlings (Sturnus vulgaris) on power lines at sunset, UK, October.