Pine marten (Martes martes) 4-5 month youngster climbing tree in Caledonian forest, The Black Isle, Inverness, Scotland.
Photographer Terry Whittaker
These super-sized stoats are returning to Scottish forests where they haven't been seen for decades, the result of legal protection and increasing woodland cover.
Did you know? Pine martens are related to otters and stoats and eat a wide variety of food from birds to berries.