Steve Knell / Boreray, under low cloud cover. This holds the largest gannetry in UK (60,000 pairs) St. Kilda, Scotland, July 2009

Eric Baccega / Devon Island, under cloud covered sky, Nunavut, Canada. August 2010

David Noton / Emerald Lake at dawn with the peaks of the President Range beyond, Yoho National Park, British Columbia, Canada. September 2009

Inaki Relanzon / Fog between the mountains. Lagos de Covadonga (Covadonga Lakes) in Picos de Europa National Park, Cantabria, Spain. October 2009

Roy Mangersnes / Two Cape / Pintado Petrels (Daption capense) in flight over Point Wild on Elephant Island, Southern Ocean, November.

Angelo Gandolfi / Bearded vulture (Gypaetus barbatus) flying over the Pyrenees mountains, Aragon, Spain.

Martin Gabriel / Arenal Volcano with crown of clouds around the summit at sunrise, La Fortuna, Costa Rica, February 2009

Jeff Vanuga / Bison herd grazing in spring with Grand Teton mountains in background, Grand Teton National Park, Wyoming, USA, April 2009

Jouan & Rius / Quiraing mountains with low cloud cover, Isle of Skye, Inner Hebrides, Scotland, UK

Jouan & Rius / Quiraing mountains with low cloud cover, Isle of Skye, Inner Hebrides, Scotland, UK

Jouan & Rius / Cloud forest with low cloud cover, Santa Elena Nature Reserve, Costa Rica

Wild Wonders of Europe / Müller / European beech forest (Fagus sylvatica) covered in low cloud cover, Polino, Umbria, Italy.

Colin Monteath / Sea of clouds cover Lake Wanaka, seen from Mount Roy, sunrise over Southern Alps, Otago, New Zealand

Aflo / Y-9005 Looking down from above high level cloud layer

Juan Carlos Munoz / Mountain landscape with low cloud cover, Gran Paradiso NP, Valsavarenche, Aosta valley, Italian alps

Juan Carlos Munoz / Mountain landscape with low cloud cover, Gran Paradiso NP, Valsavarenche, Aosta valley, Italian alps

Juan Carlos Munoz / Mountain landscape with low cloud cover, Gran Paradiso NP, Valsavarenche, Aosta valley, Italian alps

Jerry Monkman / Low cloud cover and early snow on the boreal forest on Mt. Lafayette, Eagle Lake and the Franconia Ridge, White Mountains, New Hampshire, USA

Yva Momatiuk & John Eastcott / Small cumulus clouds cover blue sky above Wonder Lake, wooden canoe dock and snowy Mt.McKinley and other peaks in Alaska Range, fall evening, Denali National Park, Alaska

Mark Moffett / Aerial view of deforestation under cloud-cover, Atlantic Forest ecosystem west of Rio de Janeiro, Brazil

Shin Yoshino / Sun behind a dense cloud cover, Okayama, Japan

Michael & Patricia Fogden / Gorge with cloud cover, Quijos River, Ecuador