Artificial pine marten dens are being installed in forests in central and eastern Scotland in a bid to help protect the Scottish red squirrel population.
Forestry and Land Scotland (FLS) are installing over 30 pine marten dens to try to halt the advance of grey squirrels who could bring squirrelpox and will vie for food resources.
The project will see the installations placed in forests along the east coast of Scotland and the A9 corridor which are potential grey squirrel migration routes.