Dogs help to count tiny harvest mice for UK survey

Sniffer dogs trained to smell out UK's smallest rodent in the wild to monitor declining populations

They are used to detect criminals evading capture, people trapped in buildings and drugs or explosives hidden in luggage. Now conservationists are recruiting the help of a sniffer dog in an effort to survey - and ultimately protect - wildlife.

The canine will be trained to detect the scent of harvest mice to help better count the elusive small mammal in the British countryside.