Barrow's Goldeneye: Iceland's Most Special Duck

Barrow's Goldeneye: Iceland's Most Special Duck

In the remote corners of Iceland's northern highlands, where volcanic springs create pockets of warmth amidst the barren tundra, lives one of the country's most remarkable avian treasures. Barrow's goldeneye (*Bucephala islandica*) represents something extraordinary in Iceland's wildlife story—a species so intimately connected to the island that its very scientific name acknowledges this unique relationship.

This striking diving duck, with its distinctive white facial crescent and piercing golden eyes, has chosen Iceland as one of only two places in the world where it breeds. The other is northwestern North America, making Iceland's population a precious European outpost of fewer than 1,000 breeding pairs scattered across the country's most pristine geothermal regions.

A Duck Unlike Any Other

Barrow's goldeneye stands apart from its close relative, the common goldeneye, through subtle but distinctive features that birdwatchers learn to identify with experience. The male's white facial patch forms a distinctive crescent rather than a round spot, whilst the female displays a more orange-yellow bill tip compared to her common cousin's brighter yellow. These differences become crucial when distinguishing between species in Iceland's mixed waterfowl flocks.

The species measures 42-53cm in length with a wingspan reaching 67-84cm, making it slightly larger than the common goldeneye. During breeding season, males develop magnificent plumage with an iridescent purple-green head that catches the light against Iceland's dramatic landscapes. Their courtship displays, featuring exaggerated head-throws and splashing performances, transform quiet mountain tarns into stages for one of nature's most elaborate rituals.

Iceland's Geothermal Gardens

What makes Barrow's goldeneye truly special in Iceland is its extraordinary relationship with the country's geothermal features. Unlike most waterfowl that migrate south when winter arrives, these ducks have evolved to exploit Iceland's year-round warm springs, allowing some individuals to remain throughout the harsh Arctic winter.

The Mývatn region in northeast Iceland hosts the country's largest concentration, where the lake's geothermal activity maintains ice-free areas even when temperatures plummet to -20°C. Here, approximately 300 pairs nest annually amongst the pseudo-craters and lava formations that define this UNESCO-recognised landscape. The nearby Laxá River system provides additional habitat, with its consistent water temperature of 4-6°C creating perfect conditions for the invertebrates these ducks depend upon.

Þingvallavatn, Iceland's largest natural lake, supports another significant population of roughly 150 breeding pairs. The lake's remarkable clarity—visibility extends to 100 metres—allows these diving ducks to hunt effectively in waters up to 20 metres deep. The surrounding Þingvellir National Park protects crucial nesting sites amongst ancient birch woodlands and lava formations.

The Northern Highland Strongholds

Beyond these well-known locations, Barrow's goldeneye inhabits some of Iceland's most remote and spectacular regions. The Highlands contain numerous small populations scattered across isolated lakes and rivers, from Langjökull glacier's meltwater lakes to the Sprengisandur plateau's hidden tarns.

Lake Þórisvatn, created by the Þjórsárdalur hydroelectric project, now supports approximately 80 breeding pairs despite its artificial origins. The lake's 88km² surface and maximum depth of 109 metres provide extensive foraging opportunities, whilst the surrounding highlands offer undisturbed nesting sites amongst dwarf birch and willow scrubland.

The Westfjords peninsula hosts smaller but equally important populations, particularly around Arnarfjörður and Ísafjarðardjúp. Here, the combination of deep fjords and mountain lakes creates perfect habitat, with breeding pairs often nesting at altitudes exceeding 400 metres above sea level.

Seasonal Rhythms and Behaviour

Barrow's goldeneye follows a precise annual cycle perfectly adapted to Iceland's extreme seasonality. Breeding pairs arrive at nesting sites between late April and early May, with timing closely linked to ice break-up and food availability. Females select nest sites in tree cavities, cliff crevices, or increasingly, artificial nest boxes installed by conservation groups.

The species demonstrates remarkable site fidelity, with pairs returning to identical locations year after year. This behaviour makes them particularly vulnerable to habitat disturbance, as traditional nesting sites represent irreplaceable resources accumulated over generations.

Egg-laying occurs between mid-May and early June, with clutches typically containing 6-12 eggs. The female incubates alone for 28-34 days whilst males gather in moulting flocks on large lakes like Mývatn and Þingvallavatn. During this vulnerable period, they become flightless for approximately four weeks whilst replacing their flight feathers.

Conservation Challenges and Success Stories

Iceland's Barrow's goldeneye population faces unique pressures despite the country's relatively pristine environment. Climate change poses the most significant long-term threat, potentially altering the geothermal systems these ducks depend upon. Hydroelectric developments, whilst generating renewable energy, have modified traditional river systems and created barriers to movement.

The Mývatn Research Station, established in 1970, conducts ongoing monitoring that provides crucial data for conservation efforts. Their research reveals population fluctuations linked to volcanic activity, harsh winters, and changing food webs within geothermal systems.

Conservation success stories include the nest box programme initiated in 1995, which has increased breeding success rates by 15% across monitored sites. These specially designed boxes, positioned near optimal foraging areas, provide secure alternatives as natural tree cavities become scarce due to historical deforestation.

Where and When to See Them

For wildlife enthusiasts seeking encounters with this remarkable species, timing and location prove crucial. The Mývatn Nature Baths area, located 3km from Reykjahlíð village, offers excellent viewing opportunities from May through September. The nearby Skútustaðir pseudo-craters provide elevated viewpoints across the lake's surface, ideal for spotting diving birds at distances up to 2km.

Þingvellir National Park's Silfra viewing platform, positioned where the Öxará River enters Þingvallavatn, allows close observation of feeding behaviours. Early morning visits between 6:00-9:00 AM typically yield the best sightings, as birds actively forage before tourist activity increases.

The optimal viewing period extends from mid-May through August, when breeding pairs remain close to nesting areas and young birds learn diving techniques in shallow water. By September, family groups begin dispersing, though some individuals remain visible throughout winter near geothermal outflows.

Access to prime viewing locations requires careful planning. Mývatn lies 463km from Reykjavík via Route 1, representing a 5.5-hour drive through spectacular highland scenery. Þingvellir sits just 47km northeast of the capital, making it accessible for day visits. Both locations offer accommodation ranging from camping (2,500 ISK per night) to luxury hotels (35,000 ISK per night).

A Living Symbol of Iceland

Barrow's goldeneye embodies Iceland's unique position as a bridge between continents, where North American species find European sanctuary amidst volcanic landscapes unlike anywhere else on Earth. Their presence transforms remote highland lakes into wildlife sanctuaries of international significance, whilst their dependency on geothermal features highlights the intricate connections binding Iceland's geological and biological heritage.

For visitors seeking authentic encounters with Iceland's distinctive wildlife, these remarkable ducks offer glimpses into evolutionary adaptations thousands of years in the making. Each sighting represents a privilege—an opportunity to witness one of Europe's rarest breeding birds thriving in landscapes that perfectly capture Iceland's wild, untamed essence.

Their survival story continues unfolding across Iceland's highlands, where golden eyes scan pristine waters beneath endless Arctic skies, ensuring future generations will witness this extraordinary partnership between bird and volcanic island.

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