Aves | 
Anseriformes | 
Anatidae
			
			
			
				Environment: milieu / climate zone / depth range / distribution range				
				
					Ecology				
				
			
			
				Others; brackish.  Subtropical			
			
			
				
			
			
			
				Arctic, Eastern Pacific and Western Atlantic:  Alaska, Canada and USA.  Subtropical to polar.
			
			
			
			
			
				Length at first maturity / Size / Weight / Age
			
			
				Maturity: Lm ?  range ? - ? cm Max length : 54.0 cm TL male/unsexed; (Ref. 94965); max. published weight: 950.00 g (Ref. 356)			
			
			
							
				
				
					
						Culmen:  3.7 cm; wing:  24.4 cm (Ref. 356).  Large duck; male:  black overall; white forehead, nape and base of bill; orange bill; female:  dark brown overall; light cheek (Ref. 94965).					
				
				
						
			
			
			
			
				
					Surface diving; coastal.  Winters from Alaska to Baja California, Nova Scotia to Florida, Gulf of Mexico (Ref. 356).				
			
			
			
			
			
				Life cycle and mating behavior				
					Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae				
			
			
				
									
			
			
			
			
			
				SAUP Database 2006 SAUP Database. www.seaaroundus.org. (Ref. 356)
			
			
			
			
			
			
			
					
						IUCN Red List Status    
						 (Ref. 130435: Version 2025-1)
					
					
					
				
			
			
			
			
				CITES status   (Ref. 108899)
			
			
				
					Not Evaluated				
			
			
			
			
			
			
				
					Not Evaluated				
			
			
			
			
			
				Threat to humans  
			
			
				
									
			
			
			
			
			
			
			
			
				Human uses  
			
			
							
			
			
				 | FishSource | 			
			
			
			
			
			
Tools
			
			
			
			
				
					More information				
				
					 Population dynamicsGrowthMax. ages / sizesLength-weight rel.Length-length rel.Length-frequenciesMass conversionAbundance   Life cycleReproduction
Maturity
Fecundity
Spawning
Eggs
Egg development
Larvae
  PhysiologyOxygen consumption
  Human RelatedStamps, coins, misc.
  
			 
			
			
			
				Internet sources
			
			
			
			
			
				Estimates based on models
			
			
			
									
						Preferred temperature  					
				 (Ref. 
115969): 3.8 - 23.7, mean 8.8 (based on 928 cells).			
 
			
			
			
			
			
						
							
				
					
						Fishing Vulnerability  					
					
					
						Moderate vulnerability (42 of 100).					
				
						
						
			
									
						Price category  					
					
					Unknown.