Aves | Anseriformes
Environment / Climate / Range
Others; brackish. Polar
Northeast Pacific, Northeast Atlantic and the Arctic. Temperate to polar.
Length at first maturity / Size / Weight / Age
Maturity: Lm ?  range ? - ? cm Max length : 46.0 cm TL male/unsexed; (Ref. 94965); max. published weight: 622.50 g (Ref. 356)
Surface diving; dabbling; coastal. Diet: Crabs (mainly Hemigrapsus nudus, Pagurus spp.), gastropods, polychaetes, amphipods, chitons, Mytilus edulis, limpets, barnacles, Clupea pallasi (eggs) and algae (Ref. 3985).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
SAUP Database. 2006. (Ref. 356)
Culmen: 2.555 cm; tarsus: 3.675 cm; wing: 20.15 cm (Ref. 356). Medium-sized duck; male: blue overall; white slashes on shoulder, neck and back; white spots on head and neck; chestnut flanks; female: brown overall; white ear spot (Ref. 94965).
IUCN Red List Status (Ref. 114614)
CITES status (Ref. 94142)
Threat to humans
| FisheriesWiki |
Estimates of some properties based on models
): 1.2 - 11.3, mean 6.6 (based on 1201 cells; Ref. 115970