A £3.5m project to save the rare freshwater pearl mussel has begun throughout Britain.
About 50% of the known breeding populations of the rare pearl mussel in Europe are in Britain, and in particular, in Scotland.
Scottish Natural Heritage (SNH) put in a joint bid for European funding.
Scientists hope the action between governments, conservation groups and fishery trusts will secure the future population of the rare mussels.
The four-year project will focus on 21 of the most important conservation sites between Sutherland and Snowdonia.
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