Artificial pine marten dens are being installed in forests along the east coast of Scotland and the A9 corridor to try to halt the worrying advance of grey squirrels.
Forestry and Land Scotland (FLS) plans to install over 30 pine marten dens along the grey squirrel migration routes in a bid to protect red squirrels.
Last year greys were recorded in Pitlochry, other parts of Perthshire and north of the River North Esk and now they are being found north of Dunkeld and moving north from Angus into Aberdeenshire for the very first time.
