If you found yourself on a rocky pier in the Faroe Islands or a wind-whipped beach in Maine, the sound echoing across the water wouldn’t necessarily strike you as avian. It is a slurred, melodic “ah-ooo” that sounds remarkably like a group of people having a very polite, very surprised conversation. Birders have affectionately noted that the Common Eider (Somateria mollissima) sounds less like a predator and more like a collective of Midwestern grandmas expressing shock over a bargain at a Home Goods store. This “pleasantly surprised” vocalization is the calling card of a bird that is essentially a heavy-duty mariner wrapped in the world’s most expensive insulation.
The Dunter and the Protection Fee
The Eider’s scientific name is a literalist’s dream: Somateria mollissima translates to “body of the softest wool”. In the Northern Isles of Scotland, locals call it the “Dunter,” a name derived from the Old Norse dunt, which describes a bobbing or bouncing motion on the waves. This isn’t just a cute nickname; it reflects a bird that spends ten months of the year sturdily bobbing in the frigid North Atlantic.
The relationship between humans and Eiders is less about hunting and more about a 1,000-year-old protection racket. In Iceland, farmers act as “night watchmen,” guarding nesting colonies from foxes and gulls. To make the ducks feel at home, these farmers might set out old tires for nests or even play radios to habituate the birds to human presence. In exchange for this security, the Eiders “pay” a protection fee: the ultra-warm down the females pluck from their own breasts to line the nests, which farmers collect only after the family has safely waddled back to the sea.
Aunties, Crèches, and Crab Surgery
Life for an Eider is a series of extreme biological gambles. During the month-long incubation period, the female enters a fast, losing up to one-third of her body weight because she refuses to leave the nest to eat. If she isn’t healthy enough to survive the fast, she might engage in a bit of “brood parasitism,” sneaking her eggs into a neighbor’s nest to ensure they hatch even if she can’t see it through.
Once the ducklings hit the water, the social structure becomes even more specialized. They form “crèches”—massive daycare centers of up to 150 ducklings overseen by a few adult females known as “aunts”. These aunts are often non-breeding females or those who lost their own broods, yet they step up to defend the collective against predators. This community spirit extends to the dinner table, where the Eider exhibits surprising dietary mechanical skills. While they usually swallow blue mussels whole and let their muscular gizzards crush the shells, they have been observed performing “surgery” on crabs, systematically removing every leg and claw before swallowing the body.
A Legacy of Resilience
The Eider is a bird that bridges the gap between ancient hagiography and modern survival. In Northumberland, they are still called “Cuddy’s Ducks” after Saint Cuthbert, who allegedly established a sanctuary for them on the Farne Islands in 676 AD. Further north, the Inuit of the Belcher Islands have a lexicon of fourteen distinct terms for the bird’s various life stages, using their skins to craft child-carrying coats that keep infants warm in the Hudson Bay winters. Whether interpreted as a hallowed protector or a “pearl-clutching” grandma, the Eider remains a testament to the fact that you can be both incredibly soft and impossibly tough.
Sources:
- The Guardian: The weird magic of eiderdown
- Icelandic Down: The Common Eider: a Bird of Uncommon Resilience
- All About Birds: Common Eider Life History
- Wikipedia: Common eider
- U.S. Fish & Wildlife Service: 7 facts you don’t know about the common eider
- r/whatsthisbird (Reddit): What is this bird? They sound like a bunch of gossipers!
- Thomas Branson: Montrose Basin Wildlife Reserve
- Teigarhorn: Eiderdown harvesting
- Material Culture Review: To Down with the Eider: The Material Culture of Eiderdown Harvesting