Barrow's goldeneye

Barrow brilduiker

Barrow's goldeneye (Bucephala islandica)

The Barrow's goldeneye (Bucephala islandica) is a medium-sized sea duck from the family of water birds that includes ducks, geese, and swans (Anatidae).

Species name

Dutch name:
Barrow brilduiker
English name:
Barrow's goldeneye 
German name:
Spatelente
French name:
Garrot d'Islande
Scientific name:
Bucephala islandica

Scientific classification

Order:
Anseriformes
Family:
Anatidae
Onderfamilie:
Merginae
Genus:
Bucephala

Description

Description:

Male:
Head with shaggy crest black, glossed with purple and green iridescents, mainly looks purple. Large white, crescentic mark between bill and eye. Head has steep, almost bulging, forehead higher then rest of crown , Neck , breast, belly and flanks pure white. except for small black extinctions from mantle down side of breast in front of closed wing and blackish border to upper flanks ; some blackish mottling on thighs and sides of vent. Upperparts, including tail black; white centers to scapulars, which are rounded -ended, from line of six to seven white patches above closed wing. Upper wing has black primaries and there converts , but white seconderies and most of forewing, separated by narrow black band, and with board black leading edge; under wing gray -brown , with only seconderies white. Short stout bill black. Legs and feet yellowish - orange. . Iris bright yellow . 

Female:
Smaller then male. Rounded head and upper neck dark chocolate brown, sometimes with slight purplish gloss, and with shaggy crest ; top of head flattish profile. Narrow white neck collar above dusky grey brown breast, which forums broad band above whitish belly; flanks , vent and under tail -converts grey-brown . Upperparts brownish- black, mottled blue -grey , with white tips, to scapulars ; rump grey, tail blackish . Upper wing has black primaries and there converts , a thin Grayish line separating the white seconderies from a small white patch on upper wing converts ; under wing gray -brown , with only seconderies white. Bill Breeding: Bright orange with black tip . Some individuals have black band across nostrils. Nonbreeding Brownish -black with a light orange hue. Legs and Feet .

Juvenile:
But darker above and on wing converts. Males have Dark brown almost black head with a purplish tinge. Show white on face late in first winter. and some white on flanks. Also some coloring on scapulars.

Standard Measurements

Body Length (cm):
The male (drake) of the Barrow's goldeneye measures approximately 40-48 centimeters. The female measures approximately 40-48 centimeters.
Body Weight (grams):
The male will weight about 1240-1310 gram. The female will weight about 1220-1280 gram.
The weight is notoriously variable and can only be used as indication!
Note:

Many female Barrow’s Goldeneyes don’t start breeding until the age of three years, but younger females may prospect for future nest sites. Females typically return to the areas where they hatched, and once they begin to breed, often return to the same nesting site year after year. Pairs form in late winter or early spring. Nests are typically located in cavities in large trees or nest boxes, although Barrow’s Goldeneyes have been known to nest in rock crevices, abandoned buildings, burrows, or in bushes on the ground when trees aren’t available. The nest itself is a depression in existing material (wood chips, leaves, or material from a previous nest), lined with down. 

After incubation has begun, the pair bond dissolves and the male begins his molt migration. The long-term pair bond is re-established in the fall. The young leave the nest one to two days after hatching, and the female leads them to an area with abundant food where they feed themselves. Broods sometimes join other broods and create large creches. This most often occurs if a brood has been abandoned early by the female, or if broods are mixed up during territorial disputes between females. Females abandon the young before they can fly, usually at 5 to 6 weeks of age, but occasionally earlier. The young fledge at 8 to 9 weeks of age.

Breeding:
The female Barrow's goldeneye usually lays from 6-12 Cream to pale buff eggs and incubates them for 29-31 days.

Bird banding:
Recommended leg band size for the Barrow's goldeneye is 11 mm.
The leg band can only be applied on a young medium-sized sea duck at around 12 days old.

It doesn't matter what leg that you band, but it is good to have a consistent system.
Suggested: Left leg = Female, Right leg = Male
Preferred food:
Lundi Exquisit
Lundi Exquisit
Lundi Exquisit
Lundi Exquisit
Lundi Exquisit
Lundi Exquisit
Lundi Exquisit

Floatable special complete food for sea birds with the highest nutritional requirements. Each chunk contains the complete nutrient spectrum. The high protein content of 35% ensures a healthy and species-appropriate diet. Spiral algae give a more magnificent coloration of plumage and sea salt promotes the salt gland.

Lundi Ibis See-Ente special
Lundi Ibis See-Ente special
Lundi Ibis See-Ente special
Lundi Ibis See-Ente special

Floating special complete food for sea birds with the highest nutritional requirements thanks to a particularly high protein content of 45%.

Ideal for daily feeding in animals that eat a lot of protein in their natural habitat. A must for "fish eaters".

Regulation:
Europese soort
Regulation:

Het is niet verboden om deze vogels te houden die van nature in Nederland voorkomen, op voorwaarde dat deze vogels in gevangenschap zijn geboren; nakweek dus. Deze vogels zijn voorzien van een gesloten pootring. Het is wel verboden om deze vogels te houden die in het wild gevangen zijn. Alleen bepaalde instanties, zoals vogelasiels en vogelhospitalen, zijn bevoegd om jonge en gewonde wilde vogels te houden. Deze bescherming van vogels wordt vormgegeven door schadelijke handelingen te verbieden zoals:het doden, verwonden, vangen, bemachtigen en met het oog daarop opsporen van vogels (art. 9 Flora- en faunawet); het opzettelijk verontrusten van vogels (art. 10 Flora- en faunawet);het beschadigen, vernielen, uithalen, wegnemen en verstoren van nesten, holen of andere voortplantings- of vaste rust- of verblijfplaatsen van vogels (art. 11 Flora- en faunawet);en het zoeken, rapen, uit het nest nemen, beschadigen of vernielen van eieren van vogels (art. 12 Flora- en faunawet).

Photos of the Barrow's goldeneye

Videos of the Barrow's goldeneye



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