Common Eider: Identification, Habitat, Behaviour and Fascinating Facts About the UK's Heaviest Sea Duck The common eider is one of the most distinctive and remarkable sea ducks found around the United Kingdom. Known for its bulky appearance, soft cooing calls, and close association with cold northern seas, the eider is a specialist of coastal life and one of the best-adapted diving ducks in the world. Often seen bobbing in sheltered coastal waters, eiders are most famous for their extraordinary nesting behaviour, where females line their nests with soft down feathers that are among the warmest natural insulating materials known to science. This down has historically been harvested by humans, giving rise to the term "eiderdown." In the UK, eiders are most closely associated with Scotland’s rugged coastlines, where they breed in significant numbers. However, smaller populations and wintering birds can be found elsewhere around the British Isles. This guide explores common...
An Intimate Guide to British Wildlife