Best Award Winning Wildlife Photography of the Year 2017
Heathrow roostings, by Daniel Trim, British Wildlife Photography awards, overall winner and urban category winner
In winter, pied wagtails roost communally in urban areas, both for protection and for the additional warmth given off by buildings and lights. This extra degree or two can make the difference in harsh weather. Here, a single individual out of hundreds is silhouetted by the lights of Terminal 5 at Heathrow airport.
Photograph: Daniel Trim/British Wildlife Photography Awards 2017