A brant goose measures 55-66 cm (22-26 in) long, spans 106-121 cm (42-48 in) across the wings and tips the scales at just 0.88-2.2 kg (1.9-4.9 lb). Its under-tail is pure white while the tail itself is the shortest of any goose, a tiny black nub that barely shows.
The dark-bellied nominate subspecies holds about 250,000 birds breeding across Siberia's Arctic coast, while the pale-bellied form also numbers roughly 250,000, nesting in northeastern Canada and wintering from Maine to Georgia. The black-legged form is smaller, with about 125,000 individuals, though it peaked at 200,000 in 1981 and fell to 100,000 by 1987.
When brants settle to raise young, they lay a clutch of three to five creamy eggs, each 7.06-7.29 cm (2.8-2.9 in) long and 4.72-4.74 cm (1.9 in) wide. Incubation takes 23-24 days, then the hatchlings are able to walk, swim and feed within a single day. This rapid development, paired with lifelong pair bonds (though females may cheat during egg-laying).
A 1931 eelgrass blight on North America's east coast wiped out the brant's favorite sea-grass buffet, forcing the survivors to switch to sea lettuce, a dietary pivot that saved the species. Those that adapted kept eating sea lettuce until eelgrass began to recover, and the habit stuck as a backup plan. As the global brant count swelled ten-fold to 400,000-500,000 by the mid-1980s, the birds also spilled onto nearby farms, grazing on grass and winter-sown cereals, showing how sheer numbers can push a coastal specialist into the agricultural landscape.
The brant goose enjoys a reassuring IUCN rating of "Least Concern," meaning it isn't teetering on the brink of extinction. Still, its migratory routes cross continents, so it falls under the Agreement on the Conservation of African-Eurasian Migratory Waterbirds (AEWA). This dual status reminds us that even common-sounding species need coordinated international stewardship to keep their Arctic-to-coast journeys alive.
Sources
Every fact above was checked against these pages, and kept only where one of them states it.
As the Brant glides effortlessly across the wetlands, its sleek, black neck and chestnut-brown feathers glisten in the sunlight, a testament to its remarkable adaptability in a world of shifting tides and seasons. With a soft, murmuring call, it moves in harmony with the landscape, its webbed feet paddling gently through the shallow waters as it forages for the sweet, salty grasses that sustain it. In its annual migrations, the Brant embarks on an epic journey, traversing vast expanses of ocean and coastline with a precision and endurance that has captivated the imagination of all who have witnessed its passage.
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