Water Vole – Arvicola terrestris (Average weight: 180–230g, total length: 29–31cm)
A rat-sized animal with a chubby face and dark chocolate-brown fur, the water vole is a good swimmer and lives beside ponds, rivers and ditches, where it digs burrows in the banks and feeds on juicy vegetation, roots and bark. It is found mainly in the lowlands, throughout mainland Britain, usually in small colonies.
One of the stamps issued for the Endangered Mammals set 13 April 2010
Card: RSPB card, photograph by Ben Hall
Postmark: The Mammal Society, Southampton
Stamp photo: © Terry Whittaker