Hirta, in the St Kilda archipelago, has seen bird numbers diminish.
KITTIWAKE numbers on St Kilda have plummeted to their lowest level ever, with experts fearing that the population is at risk of collapse.
The National Trust for Scotland carries out yearly monitoring of the archipelago’s bird population. Across the seven monitoring sites this season there was just one kittiwake nest, and one chick hatched – which later died.