WhenToBird

Calidris mauri · Scolopacidae

Western Sandpiper: When and Where to See It

Adult Western Sandpiper
Photo: Ken Clark, CC BY 4.0 via iNaturalist

The Western Sandpiper reaches California first, around late June, and Arkansas last, around early August.

JanFebMarAprMayJunJulAugSepOctNovDec
today
Second week of November

Each county is shaded by the share of complete checklists there that listed the bird, blended with the weeks either side. Darker is more often. It follows where people watch birds, not how many birds there are. How to read it.

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0%1%2%3%Jan 1-7: 0.5% of 1114036 checklistsJan 8-14: 0.5% of 824708 checklistsJan 15-21: 0.5% of 825978 checklistsJan 22-31: 0.5% of 1105853 checklistsFeb 1-7: 0.4% of 779772 checklistsFeb 8-14: 0.4% of 864504 checklistsFeb 15-21: 0.3% of 1127933 checklistsFeb 22-28: 0.4% of 840124 checklistsMar 1-7: 0.4% of 839610 checklistsMar 8-14: 0.4% of 870138 checklistsMar 15-21: 0.4% of 898456 checklistsMar 22-31: 0.4% of 1335637 checklistsApr 1-7: 0.5% of 1030617 checklistsApr 8-14: 0.6% of 1124024 checklistsApr 15-21: 0.9% of 1194575 checklistsApr 22-30: 1.0% of 1675723 checklistsMay 1-7: 0.8% of 1449080 checklistsMay 8-14: 0.5% of 1538353 checklistsMay 15-21: 0.3% of 1219898 checklistsMay 22-31: 0.2% of 1452282 checklistsJun 1-7: 0.1% of 900636 checklistsJun 8-14: 0.1% of 829907 checklistsJun 15-21: 0.1% of 773255 checklistsJun 22-30: 0.2% of 916255 checklistsJul 1-7: 0.7% of 717733 checklistsJul 8-14: 1.2% of 658223 checklistsJul 15-21: 1.6% of 638752 checklistsJul 22-31: 1.7% of 895727 checklistsAug 1-7: 1.9% of 655651 checklistsAug 8-14: 2.4% of 650038 checklistsAug 15-21: 2.8% of 654639 checklistsAug 22-31: 2.8% of 974928 checklistsSep 1-7: 2.4% of 765914 checklistsSep 8-14: 1.9% of 738674 checklistsSep 15-21: 1.6% of 750433 checklistsSep 22-30: 1.2% of 944196 checklistsOct 1-7: 0.9% of 760106 checklistsOct 8-14: 0.8% of 793131 checklistsOct 15-21: 0.8% of 728727 checklistsOct 22-31: 0.7% of 959954 checklistsNov 1-7: 0.7% of 709464 checklistsNov 8-14: 0.7% of 693424 checklistsNov 15-21: 0.7% of 653952 checklistsNov 22-30: 0.6% of 871137 checklistsDec 1-7: 0.6% of 627591 checklistsDec 8-14: 0.6% of 642427 checklistsDec 15-21: 0.5% of 775638 checklistsDec 22-31: 0.5% of 1132751 checklistsJanFebMarAprMayJunJulAugSepOctNovDec
Share of complete checklists reporting it, by week (4 per month). Grey bars: fewer than 10 checklists, not counted.

Pooled across every state in the data, so it leans toward states with the most birders.

States, in order of first arrivals

StatePatternFirst arrivalsPeakMost gone byPeak %
AlaskaSummer visitorApr 15-21May 8-14Sep 8-1410%
CaliforniaSummer visitorJun 22-30Aug 15-21May 8-1411%
OregonSummer visitorJun 22-30Aug 22-31Oct 1-711%
WashingtonSummer visitorJun 22-30Aug 15-21Dec 1-710%
New MexicoSummer visitorJun 22-30Aug 22-31Nov 8-142.8%
NevadaSummer visitorJul 1-7Aug 15-21Oct 1-78.2%
IdahoSummer visitorJul 1-7Aug 15-21Sep 15-215.5%
ArizonaSummer visitorJul 1-7Aug 22-31Nov 1-74.4%
DelawareSummer visitorJul 1-7Jul 22-31Oct 1-73.8%
FloridaSummer visitorJul 8-14Sep 1-7May 15-212.8%
TexasSummer visitorJul 8-14Aug 22-31Dec 8-143.2%
AlabamaSummer visitorJul 8-14Aug 22-31Nov 22-302.3%
ColoradoSummer visitorJul 8-14Aug 22-31Sep 22-301.5%
LouisianaSummer visitorJul 8-14Sep 1-7Dec 22-312.5%
North CarolinaSummer visitorJul 8-14Aug 22-31Dec 1-71.1%
Rhode IslandPasses throughJul 8-14Aug 22-31Sep 8-141.4%
UtahSummer visitorJul 8-14Aug 22-31Sep 22-302.0%
MississippiSummer visitorJul 15-21Aug 22-31Nov 1-73.6%
MontanaPasses throughJul 15-21Aug 15-21Sep 8-141.3%
New JerseySummer visitorJul 15-21Aug 22-31Oct 22-311.2%
ArkansasPasses throughAug 1-7Aug 22-31Sep 8-142.1%
South CarolinaWinter visitorJul 15-21Nov 22-30Apr 8-142.6%

Winter visitor in: South Carolina

Summer visitor in: Alaska