The Western Isles' mild oceanic climate could be helping a pest to survive in places where it was not previously thought to thrive
Ticks can often be encountered in woodland, but new research has found high numbers in some treeless island habitats.
Lyme disease can be spread to humans from the bite of infected ticks.
Researchers found some isles had an incidence of the disease 40 times higher than the Scottish average.
The Western Isles has been trying to tackle the risk posed by infected ticks for a number of years.