Breeds in acidic rivers and streams of all sizes. May be found away from its breeding habitat over heathland.

• Climate change; increasing temperatures and erratic rainfall threaten the species bog pool habitat.
• Ditch installation and drainage.
• Peat cutting.
• Forestation of the uplands.

Widely distributed in Scotland, Wales, and north and west England.

Common Club-tail

• much smaller
• eyes are separate.