Michael & Patricia Fogden / White-necked Jacobin (Florisuga mellivora) hummingbird male feeding on nectar of Fairy Duster (Calliandra sp) flower in cloud forest, Tandayapa Valley, western slope of Andes, Ecuador

David Welling / A thunderstorm drops heavy rain over the hoodoo sandstone formations. Bryce Canyon National Park, Utah, USA, August.

Inaki Relanzon / Isolated rain storm above the sea. Bahamas Sea, Bahamas, North America, August 2006.

Christophe Courteau / Clouds during the rainy season in the Kalahari Desert, Botswana, March 2009

Pete Oxford / Rainbow over rainforest and Kanuku Mountains, Upper Takutu-Upper Essequibo, Guyana

Alan Watson / Montane rainforest canopy and clouds at 1,200 metres, Ranomafana National Park, Madagascar January 2009

David Woodfall / Dark monsoon rain clouds over the Pasur river, Ganges delta, Bangladesh, November 2008

Stephen Dalton / Highland rubyspot (Hetaerina sp) in flight, Venezuealan cloudforest. South America

Benoit Stichelbaut / Rain shower approaching La Vieille lighthouse, Pointe du Raz, Brittany, France. November 2006.

Thomas Marent / Banded Anole (Anolis insignis) displaying dewlap in cloud forest, Costa Rica

Anup Shah / Storm cloud and rainbow over Wildebeest on Masai Mara GR, Kenya

Michael & Patricia Fogden / Interior cloud forest, shafts of sunlight shining through canopy break allowing growth of understory plants, Costa Rica