Barrow's Goldeneye (Bucephala islandica) lives in arctic tundra across North America. It feeds on mollusks and crustaceans. Its conservation status is Least Concern.
Fascinating facts about the Barrow's Goldeneye
- Barrow's goldeneye belongs to the genus Bucephala, a name taken from Ancient Greek boukephalos meaning "bullheaded". The term combines bous ("bull") and kephale ("head") and was chosen because the related bufflehead has a noticeably bulbous head shape. This etymology highlights a distinctive physical trait shared within the genus, linking the bird's appearance to its scientific name.
- When breeding is finished, Barrow's goldeneyes travel to specialised molting sites where they shed and regrow their feathers, a period that renders them flightless for anywhere from 20-40 days. These sites are typically wetlands that stay moist during drought and provide abundant food, reducing exposure to humans and predators. The extended flightless phase is essential for replacing worn plumage before the birds resume migration.
- Male Barrow's goldeneyes defend their territories with conspicuous displays that last about six minutes. These territorial performances occur both on land and in the water, and they often provoke rival drakes to launch their own shows. Such displays help maintain breeding boundaries and reinforce the male's claim over valuable nesting and foraging areas.
- Barrow's goldeneye is an extremely rare vagrant to western Europe, with only three records of vagrants from Scotland. These three birds constitute the sole accepted wild sightings of the species in Europe beyond its Icelandic range, where it is a common resident of Lake Mývatn. Outside Iceland the species is otherwise absent from the continent, making each Scottish record a notable exception to its normal distribution.
- Barrow's goldeneye forages underwater, taking a diet dominated by marine crustaceans. The main staples are Gammarus oceanicus and Calliopius laeviusculus, both marine crustaceans, and a large part of the intake also includes mussels and gastropods. In addition to these, the duck consumes aquatic insects and pond vegetation, reflecting its versatile diving feeding habits.
Sources
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At a glance
RangeNorth America
HabitatArctic tundra
DietMollusks and crustaceans
About the Barrow's Goldeneye
In the icy waters of the northern hemisphere, the Barrow's Goldeneye glides with effortless elegance, its sleek, black-and-white form slicing through the ripples with a quiet confidence that belies its remarkable adaptability. As it moves, the goldeneye's head bobs up and down, its bright, inquisitive eyes scanning the depths for the small crustaceans and insects that sustain it, a testament to the resourcefulness that has allowed this duck to thrive in some of the most unforgiving landscapes on Earth. With each dive, the goldeneye's wings beat swiftly, propelling it downward with a fluid power that is both beautiful and deadly, a true marvel of evolutionary design.
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