They tend to go up the trees quite often when bieng hunted ive found,, Seen them up trees along rivers on the lamp aswell,, Was out lamping this time last year and seen a mink up a tree hunting a perching moorhen. ,They can hunt and cause alot of damage along rivers and brooks beacuse of there abilty to climb trees and stuff,, But its not only water ive found them by, Dogs usually travel of the water more than the females ive found.