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The time of year that the breeding season occurs in depends on how late in the year the snow melts. The later the melt, the later the breeding season. 4 or 5 eggs are laid. The incubation period lasts around 25 days, with the female taking on the entirety of the incubation duty. However the male stays nearby and will guard the nest at times so the female can go off to feed.
Juvenile pair: $300

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BARNACLE GOOSE - (Branta leucopsis) 
Description:Young adult barnacle geese (in their first winter) look very much the same as adults with slight plumage color variations. The black feathers of the neck and chest will often have a duller color compared to those of adults. It is possible to see a few brown feathers in the neck region as well. The faces of young birds may have few dark fleckings which can be hard to detect from a distance.Downy young barnacle geese have grey-brown feathers on their dorsal parts, neck, chest, and crown. The ventrum of the downy young is pale-yellow. The line of feathers that extends from the bill to the eye is dark-grey colored. The feet and the bill are dark-grey colored as well. White spots are common on the wings.
  • Range mass1.4 to 2.2 kg3.08 to 4.85 lb
  • Average mass1.9 kg4.19 lb
  • Range length55 to 70 cm21.65 to 27.56 in
  • Average length64 cm25.20 in
  • Range wingspan130 to 145 cm51.18 to 57.09 in
  • Average wingspan141 cm55.51 in
    Location:           European North Atlantic islands. Infrequent sightings along the northern North American east coast.Conservation status: Least Concern.
  • Diet:
    Grass, sedge, roots, moss, herbs.

  • Appearance:            Black neck, breast, cap, and bill, white face and belly, black on white plumage on the back.Barnacle Geese mature sexually around 3 years of age.  
  • Reproduction:
    Barnacle geese that have reached sexual maturity will choose their partners in early spring. Partner retention in Branta leucopsis is lifelong and monogamous. This partnership is believed to be established with a triumph ceremony in which the male will vocalize and change postures to impress the female. During this ceremony, the male will make loud calls and change the orientation and angle of his head relative to ground.
     If the female is willing to participate, she responds with loud calls and the male will increase the intensity of his movements and later try to approach the female. At times during the triumph ceremony, if a male catches the attention of a nearby female, he may exaggerate his displays by flicking his wings and lowering his head closer and more parallel to the ground. The goal of the male in this ceremony is to make contact with the female with his bill. If the female does not draw herself away, the male takes it as a sign of acceptance and forces all nearby males away. It is also believed that pairs may engage in the triumph ceremony each year to strengthen their partnership.

    • Mating System: Monogamous
    The breeding season occurs in spring, spanning from late May to June. Barnacle geese reaches sexual maturity at two years of age. However, rarely, males will be observed breeding at one year of age with females that are older. Barnacle geese that have mated for the first time at four years of age have also been recorded. It is believed that the age in which these geese mature may be related to environmental factors such as food availability and overall weather conditions. The female usually lays one egg per day until the desired clutch size (4 to 5 eggs) can be obtained. These eggs are pale gray colored. The clutch is incubated for 24 to 26 days and the young typically fledge 40 days after hatching.