Terry Whittaker,Terry Whittaker / Water Vole (Arvicola amphibius) emerging from pipe at side of river, Kent, UK, December

Stephen Dalton / Brown rat (Rattus norvegious) silhoutted in sewage piping, UK, controlled conditions

Mark Taylor / Stray puppies outside their drain pipe hide away. Thailand, December.

Stephen Dalton / Black rat (Rattus rattus) on drain pipe in building.

Stephen Dalton / Brown rat (Rattus norvegicus) leaping out of land drain at night, Sussex, UK. January.

Nigel Cattlin / Concrete field drain outlet draining off agricultural land into large drainage dyke on fenland, Cambridgeshire, England, UK.