Calum looks after the Meikleour Fishings on the River Tay. He's been a dedicated mink volunteer for years, monitoring his patch and successfully catching several mink. 

Calum said "Mink have a devastating impact on our local wildlife - I've witnessed it with my own eyes; I once watched a mink raiding a kingfisher nest, it came back again and again, until it had taken every chick out of that nest, it was total devastation."