Barnacle Goose

The Barnacle Goose is a small, strikingly patterned goose named in medieval folklore for a mistaken belief that it hatched from goose barnacles rather than eggs. It has a clean black neck and breast, a creamy-white face, and a finely barred grey, black, and white back and flanks that give it a scaly, almost pearlescent look at close range.

Adults of both sexes look alike, with males averaging only slightly larger than females. In flight, flocks form loose lines or V-shapes, and the goose's small size and quick wingbeats compared to larger geese are useful clues even at a distance.

Key field marks

• Black neck, breast, and crown contrasting sharply with a creamy-white face
• Finely barred silvery-grey, black, and white upperparts and flanks
• Black bill and legs, notably small and stubby compared to other geese
• Compact, short-necked build

Similar species

• Canada Goose: much larger, with a brown body and white chinstrap rather than an all-white face
• Brant (Brent Goose): also black-necked but lacks the white face, showing only a small white neck patch

The combination of an all-white face and black breast is unique among common geese and makes the Barnacle Goose easy to identify once seen.

Range and habitat

Barnacle Geese breed colonially on steep, predator-free sea cliffs and rocky coastal tundra in the Arctic, including Svalbard, Greenland, and Novaya Zemlya. Nesting high on cliffs forces newly hatched goslings to make a dramatic, often fatal leap to the ground within days of hatching to reach feeding areas.

Migration

Outside the breeding season, the species migrates to temperate coastal areas, chiefly the British Isles, the Netherlands, and Germany, where flocks graze on coastal grasslands, salt marshes, and increasingly on inland farm fields and airport turf. Distinct breeding populations (Svalbard, Greenland, and Russian) winter in largely separate regions.

Behavior

Barnacle Geese are highly social, forming large, tightly packed flocks outside the breeding season that graze almost constantly on short grass. They are wary and quick to take flight if disturbed, often departing as a synchronized, noisy group.

Voice

The call is a sharp, yapping or barking "kah-kah-kah," higher-pitched and more terrier-like than the deeper honking of Canada Geese; large flocks produce a constant chattering chorus.

Feeding

They graze almost exclusively by grubbing on short grasses, sedges, and clover, feeding communally in tight flocks that move steadily across a field or marsh.

Nesting and breeding

Nests are simple down-lined scrapes on cliff ledges, chosen specifically to be inaccessible to Arctic foxes. Goslings must jump from the nest ledge, sometimes falling many meters onto rock, within two to three days of hatching in order to follow their parents to feeding grounds.