Species Profile
Barnacle Goose
Branta leucopsis
Barnacle Goose
Quick Facts
Conservation
LCLeast ConcernAlso known as: Barnacle
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Appearance
The Barnacle Goose is a striking bird with a predominantly white face and black neck, breast, and upper back. Its wings and back are silvery grey with black and white bars, creating a distinctive pattern. The belly is white, contrasting sharply with the black chest.
Both sexes look alike, with males being slightly larger. Juveniles have duller plumage with greyish tones on the head and neck, gradually acquiring adult colouration over their first winter.
Identification & Characteristics
Colors
- Primary
- Black
- Secondary
- Grey
- Beak
- Black
- Legs
- Black
Attributes
Understanding Attributes
Rated 0–100 based on research and observation. A score of 50 is average across all bird species. These attributes are relative and don't necessarily indicate superiority.
Habitat & Distribution
Barnacle Geese breed in the high Arctic regions of Greenland, Svalbard, and Novaya Zemlya. They prefer coastal tundra and rocky islands for nesting, often close to cliffs that provide protection from predators.
During winter, they migrate to coastal areas of northwestern Europe, including significant populations in the UK, Ireland, and the Netherlands. They favour coastal grasslands, salt marshes, and agricultural fields in these wintering grounds.
Distribution
Where to See This Bird
Explore regional guides for locations where this bird has been recorded.
Diet
Barnacle Geese are primarily herbivorous, feeding on a variety of grasses, sedges, and herbs. In their wintering grounds, they often graze on agricultural crops and salt marsh vegetation. During the breeding season, they may supplement their diet with berries and Arctic plants.
They eat a lot - sometimes over 150 grams per day (dry weight), and defecate 160 times each day on average.
Behaviour
Barnacle Geese are highly social, often seen in large flocks during migration and winter. They have a distinctive waddling gait on land but are graceful swimmers.
During the breeding season, pairs become territorial and fiercely protective of their nesting sites, often returning to the same location year after year.
Calls & Sounds
The Barnacle Goose has a distinctive, high-pitched barking call, often described as 'kaw-kaw' or 'gnk-gnk'. These vocalisations are frequently heard during flight and when flocks are grazing. During the breeding season, pairs use softer, more varied calls to communicate.
Nesting & Breeding
Barnacle Geese form monogamous pairs that often last for life. Breeding begins in late May to early June, coinciding with the brief Arctic summer. Pairs typically return to the same nesting sites each year.
Nests are built on cliff ledges or rocky outcrops, lined with down and plant material. The female lays 4-6 creamy white eggs with light brown mottling, which she incubates for about 24-25 days.
Both parents guard the nest and care for the goslings. The young fledge after about 40-45 days, just in time for the autumn migration south.
Conservation
While currently listed as Least Concern, Barnacle Geese face threats from habitat loss due to climate change in their Arctic breeding grounds.
Conservation efforts focus on protecting key wintering sites and managing agricultural conflicts in their wintering range.
Birdwatching Tips
- Look for large flocks in coastal grasslands and salt marshes during winter.
- Listen for their distinctive barking call, which sounds like a high-pitched 'kaw-kaw'.
- Observe their feeding behaviour in short grass fields, where they graze in tight groups.
- In the UK, popular viewing spots include the Solway Firth and the Isle of Islay.
Did You Know?
- Barnacle Geese got their name from an old myth that they hatched from barnacles attached to driftwood.
- They can fly at altitudes of up to 2,400 meters during migration.
- Barnacle Geese have specially adapted digestive systems to process their high-fibre diet efficiently.
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