Aves | 
Charadriiformes | 
Scolopacidae
			
			
			
				Environment: milieu / climate zone / depth range / distribution range				
				
					Ecology				
				
			
			
				Others; freshwater; brackish.  Temperate			
			
			
				
			
			
			
				Arctic and Northeast Pacific:  Alaska and Canada.  Temperate to polar.
			
			
			
			
			
				Length at first maturity / Size / Weight / Age
			
			
				Maturity: Lm ?  range ? - ? cm Max length : 18.0 cm TL male/unsexed; (Ref. 94965)			
			
			
						
			
			
			
			
				
					Impressive flight speed recorded at over 70 kph of a radio-tagged Western Sandpiper that flew 3000 km from San Francisco, California to the Copper River Delta, Alaska within 42 h; typically, such straight flights are not common for this species (Ref. 87784). Interacts with marine environment on estuarine mudflats where there is an abundance of soft sediment invertebrate prey found by probing in the mud.  At San Francisco Bay, feed on mudflats on low tides and move to seasonal wetlands and salt ponds on high tides as water levels cover their feeding habitat affecting prey availability. Impressive flight speed recorded at over 70 kph of a radio-tagged Western Sandpiper that flew 3000 km from San Francisco, California to the Copper River Delta, Alaska within 42 h; typically, such straight flights are not common for this species.  Three to four million may aggregate in spring at the Copper River Delta, Alaska within a 4-week period, on their way to their tundra nesting grounds together with millions of other shorebirds stopping at the delta. Preyed upon by the Peregrine Falcon (Falco peregrinus) on estuaries worldwide; form tight groups of wheeling flocks as an evasive tactic against  the hunting Peregrine Falcon (Ref. 87784).				
			
			
			
			
			
				Life cycle and mating behavior				
					Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae				
			
			
				
									
			
			
			
			
			
				Gaydos, J.K. and S.F. Pearson 2011 Birds and mammals that depend on the Salish Sea: a compilation. Northwestern Naturalist 92(2):79-94. (Ref. 93905)
			
			
			
			
			
			
			
					
						IUCN Red List Status    
						 (Ref. 130435: Version 2025-1)
					
					
					
				
			
			
			
			
				CITES status   (Ref. 108899)
			
			
				
					Not Evaluated				
			
			
			
			
			
			
				
					Not Evaluated				
			
			
			
			
			
				Threat to humans  
			
			
				
					  Harmless				
			
			
			
			
			
			
			
			
				Human uses  
			
			
							
			
			
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					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
			
			
			
							
			
			
			
			
			
						
							
				
					
						Fishing Vulnerability  					
					
					
						Low vulnerability (10 of 100).