Common Eider (Somateria mollissima) lives in arctic tundra across Northern Hemisphere. It feeds on mollusks & crustaceans. Its conservation status is Near Threatened.
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A real field recording of the Common Eider, made in the wild.
A single female eider lines her nest with down plucked from her own breast, creating a soft, insulated blanket that keeps ducklings warm in Arctic breezes. Harvesters can collect this eiderdown after the chicks leave, causing no harm to the birds, which makes the practice sustainable and supports a multi-million-dollar luxury-down industry. The fact shows how a natural behavior can be turned into an economic resource without endangering the species.
Common eiders weigh between 0.81 and 3.04 kg (1 lb 12½ oz to 6 lb 11 oz) and span 80-110 cm (31-43 in) across the wings, making them the largest of the four eider species and the biggest duck in the northern hemisphere. Their bulk helps them dive deep for mussels and crabs, crushing shells in a powerful gizzard, though gulls still pose a threat to eggs and ducklings.
Eider colonies can swell from fewer than 100 individuals to over 15 000 individuals, and females often return to the exact island where they hatched, a behavior called natal philopatry. This strong site fidelity creates kin-based social structures that enable cooperative breeding, such as laying eggs in relatives' nests and crèching, where groups of females share duckling-rearing duties.
Global analyses show that common eiders, a large, migratory bird, have experienced a decline in offspring production over the past 50 years, mirroring trends in other big migrators like Adélie penguins. As temperatures rose about 1 °C since 1970, these single-brooded species struggled to sync breeding with peak food, leading to fewer chicks per year, a warning sign that climate change may erode the reproductive success of Arctic waterfowl.
Each eider nest is lined with its own down, harvested after ducklings leave without harming the birds. The same feathers that once kept the chicks warm now fill luxury pillows, showing how sustainable wildlife products can exist when humans respect the animal's life cycle.
Sources
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In the rugged, windswept landscapes of the northern hemisphere, the Common Eider glides effortlessly, its sleek, black-and-white feathers glistening like polished stone as it navigates the turbulent tides. With a gentle, rolling motion, it paddles through the waves, its webbed feet propelling it with a quiet strength, as if drawn by an unseen current to the hidden coves and rocky outcroppings that cradle its precious nests. As it moves, the Eider's soft, cooing calls weave a haunting melody, a siren's song that echoes across the wild, unforgiving beauty of its native shores.
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