Scientists at Abertay University have made a major breakthrough that could lead to an upsurge in convictions for wildlife crimes.
Bird of prey
The only bird of prey poisoned in Scotland last year was found in Highland Perthshire, according to official statistics.
A young golden eagle tagged in Scotland last summer is thought to have been killed just seven miles from the Scottish Parliament, and its body dumped in the North Sea.
A bird of prey hovering over Carnoustie has claimed a large area of the town as its own and will attack to defend it.