Purple sandpiper, Ny Alesund

Purple sandpiper, caldiris maritma, on the beach, at Ny Alesund, Svalbard.

Photographed during the Greenpeace Arctic Under Pressure expedition 2010. www.greenpeace.org/arctic2010

Chief Bottle Washer at Blather
Writer, photographer, environmental campaigner and "known troublemaker" Dave Walsh is the founder of Blather.net, described both as "possibly the most arrogant and depraved website to be found either side of the majestic Shannon River", and "the nicest website circulating in Ireland". Half Irishman, half-bicycle. He lives in southern Irish city of Barcelona.