The Common Eider is a large sea duck uniquely adapted to cold, coastal marine environments across the northern hemisphere, characterized by its dense, insulating plumage and robust bill for crushing mollusks. Research explores its specialized diet of marine invertebrates, social behaviors including cooperative brood rearing in crèches, and its vital role as a keystone and indicator species, while addressing challenges from climate change and pollution to inform conservation efforts.

View photos and videos of Common Eider (Somateria mollissima):

https://muuuh.com/birds/common-eider/