John Waters / Walkers strolling along the bank between in flooded Aller Moor, with mistletoe laden apple tree, near Burrowbridge, Somerset Levels, Somerset, UK. January 2014

Ernie Janes,Ernie Janes / Walkers on footpath in farmland from Wiveton Downs, North Norfolk, UK, March

Nick Turner / Walkers on the South West Coast Path National Trail near Durdle Door, Dorset, UK, May 2009.

Mark Hamblin / 2020VISION / Two Rock ptarmigan (Lagopus mutus) in winter plumage with hill walkers in background, Cairngorms NP, Scotland, UK, February 2010. 2020VISION Book Plate.

Peter Cairns / 2020VISION / Line of mountain walkers in winter, Lochain Mountains, Cairngorms NP, Highlands, Scotland, UK, February 2010. 2020VISION Exhibition. 2020VISION Book Plate.

Andrew Parkinson / Pair of Great skuas (Stercorarius skua) on a misty moorland with person walking close to their territory. Shetland Islands, Scotland, UK, June. (non-ex)

Alex Mustard / Caribbean reef shark (Carcharhinus perezi) over sand ripples, Walkers Cay, Bahamas. Tropical West Atlantic Ocean. Taken with natural light.

Alex Mustard / A lone Caribbean reef shark (Carcharhinus perezi) cruises over sand ripples. Walkers Cay, Northern Bahama Islands, Republic of Bahamas.

Laurent Geslin / Landscape of mountains in winter, with walkers crossing peaks, in the Jura region, Switzerland. January 2009

Laurent Geslin / Grey heron (Ardea cinerea) portrait in urban park, with walkers / pedestrians in background, Paris. France, November.

Will Watson / Domestic horse, grey Welsh Pony (Equus caballus) and walkers in snow on Offa's Dyke Path, Hergest Ridge, Wales, UK. February 2009

Doug Perrine / Blacktip shark patrolling {Carcharhinus limbatus} Walkers Cay, Bahamas, Caribbean Sea (Non-ex).