Rahasane turlough is the largest surviving turlough in Ireland. A turlough is a karst lake, which has no surface outlet and is surrounded on all sides by rising land. 

The turlough is of great significance to wildlife as it is the location for migrating birds, and wintering ground for the white-fronted goose. It is also one of the few known breeding grounds in Ireland of the Eurasian wigeon.


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