Platypus are small, dark-brown, furry, egg-laying mammals with webbed paws and a duck-like beak. Platypus live in burrows which they dig into the banks of rivers. They are diving animals, and can stay under water for up to fifteen minutes. Unlike a duck's beak, the platypus' beak is rubbery and flexible. It has hundreds of electroreceptor cells inside it, which can detect the electrical currents that are caused by its prey swimming through the water. Platypus can be found along Australia’s eastern coastal areas in small streams and quiet rivers. See them in Tidbinbilla Nature Reserve near Canberra, on Lake Elizabeth in Victoria’s Great Otway National Park on the Great Ocean Road and in Tasmania’s Cradle Mountain-Lake St Clair National Park.