Alex Hyde / Photographer heating silica gel over camp fire in rainforest to restore its desiccating properties. The high humidity of the rainforest can fog camera lenses and lead to mould growth, so silica gel is used to trap moisture. Maliau Basin, Sabah, Borneo, May 2011.

Mike Wilkes / Black magpie (Ptilosomus afer) juvenile searching for food on ground, The Gambia

Mike Wilkes / Black magpie (Ptilostomus afer) searching for food on ground, The Gambia, December