WhenToBird

Calidris alba · Scolopacidae

When Do Sanderlings Arrive in Washington?

Adult Sanderling
Photo: Peter Chen 2.0, CC BY 4.0 via iNaturalist

Sanderlings arrive in Washington in mid July, peak in early September (2.3% of checklists), and most are gone by the second week of May.

When to look

First arrivalsJul 15-21mid July
Common byJul 15-21mid July
PeakSep 1-7early September
Most gone byMay 8-14the second week of May

Best: early September. First arrivals mid July; most are gone by the second week of May. Peak: on about 2.3% of Washington checklists.

  1. Jancommon
  2. Febcommon
  3. Maruncommon
  4. Apruncommon
  5. Mayuncommon
  6. Junrare
  7. Juluncommon
  8. Augpeak season
  9. Seppeak season
  10. Octcommon
  11. Novcommon
  12. Deccommon

Darker months: more checklists report it. Outlined: peak month.

0%1%2%3%Jan 1-7: 1.4% of 41928 checklistsJan 8-14: 1.3% of 31152 checklistsJan 15-21: 1.5% of 31753 checklistsJan 22-31: 1.3% of 42530 checklistsFeb 1-7: 1.2% of 29739 checklistsFeb 8-14: 1.0% of 32746 checklistsFeb 15-21: 0.9% of 40328 checklistsFeb 22-28: 1.0% of 28432 checklistsMar 1-7: 0.8% of 30758 checklistsMar 8-14: 0.8% of 29368 checklistsMar 15-21: 0.9% of 32580 checklistsMar 22-31: 0.7% of 45614 checklistsApr 1-7: 0.6% of 33997 checklistsApr 8-14: 0.8% of 34729 checklistsApr 15-21: 0.7% of 38474 checklistsApr 22-30: 0.9% of 52185 checklistsMay 1-7: 1.0% of 44236 checklistsMay 8-14: 0.5% of 48708 checklistsMay 15-21: 0.5% of 41742 checklistsMay 22-31: 0.2% of 57082 checklistsJun 1-7: 0.1% of 39193 checklistsJun 8-14: 0.1% of 36042 checklistsJun 15-21: 0.1% of 34003 checklistsJun 22-30: 0.1% of 39711 checklistsJul 1-7: 0.1% of 31949 checklistsJul 8-14: 0.2% of 29086 checklistsJul 15-21: 0.6% of 28045 checklistsJul 22-31: 0.8% of 38275 checklistsAug 1-7: 0.8% of 28846 checklistsAug 8-14: 1.1% of 28036 checklistsAug 15-21: 1.4% of 27614 checklistsAug 22-31: 2.3% of 40356 checklistsSep 1-7: 2.3% of 31214 checklistsSep 8-14: 2.3% of 27795 checklistsSep 15-21: 2.0% of 29677 checklistsSep 22-30: 1.3% of 35241 checklistsOct 1-7: 0.9% of 28605 checklistsOct 8-14: 0.9% of 28655 checklistsOct 15-21: 1.1% of 24643 checklistsOct 22-31: 1.3% of 34874 checklistsNov 1-7: 1.3% of 25658 checklistsNov 8-14: 1.5% of 25700 checklistsNov 15-21: 1.3% of 24331 checklistsNov 22-30: 1.5% of 32784 checklistsDec 1-7: 1.6% of 24099 checklistsDec 8-14: 1.2% of 23339 checklistsDec 15-21: 0.9% of 27666 checklistsDec 22-31: 1.1% of 42130 checklistsJanFebMarAprMayJunJulAugSepOctNovDec
Share of complete checklists reporting it, by week (4 per month). Grey bars: fewer than 10 checklists, not counted.

Frequency is the share of complete checklists in Washington that listed the bird, 2016–2025. It is not a head count, and it follows where and when people go birding. How to read it.

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.

Embed this map on your site

Where in Washington

Best counties

Share of checklists at the peak
  1. Grays Harbor CountyBest the second week of December · 247 checklists that week, 28,443 in all22%
  2. Pacific CountyBest late January · 390 checklists that week, 19,516 in all17%
  3. Clallam CountyBest the second week of January · 1581 checklists that week, 85,362 in all8.6%
  4. Jefferson CountyBest early February · 972 checklists that week, 59,663 in all7.3%
  5. Grant CountyBest early September · 593 checklists that week, 19,963 in all6.4%
  6. Whatcom CountyBest the second week of September · 1008 checklists that week, 64,687 in all4.0%

Best spots

Share of checklists at the peak
  1. Fort FlaglerJefferson County, best early February · 53 checklists that week, 1,284 in all91%
  2. Griffith-PridayGrays Harbor County, best the second week of December · 24 checklists that week, 466 in all79%
  3. Fort Flagler (east)Jefferson County, best late January · 22 checklists that week, 573 in all75%
  4. Horseshoe LakeGrays Harbor County, best early May · 20 checklists that week, 357 in all68%
  5. Point BrownGrays Harbor County, best early December · 35 checklists that week, 1,557 in all66%

Busy spots report more of everything; compare the checklist counts before you drive anywhere.

Best time of day

In Washington, the Sanderling is most often listed on checklists started between 11 am and 1 pm (1.1% of those checklists).

0%0.5%1%1.5%12 am: too few checklists (796) to judge1 am: too few checklists (776) to judge2 am: too few checklists (709) to judge3 am: too few checklists (901) to judge4 am: too few checklists (3221) to judge5 am: too few checklists (16576) to judge6 am: 0.8% of 56744 checklists7 am: 0.8% of 133294 checklists8 am: 0.9% of 184196 checklists9 am: 1.0% of 186303 checklists10 am: 1.1% of 177063 checklists11 am: 1.1% of 154936 checklists12 pm: 1.1% of 138061 checklists1 pm: 1.1% of 127449 checklists2 pm: 1.1% of 121511 checklists3 pm: 1.0% of 107793 checklists4 pm: 0.9% of 82862 checklists5 pm: 0.8% of 57183 checklists6 pm: 0.6% of 39886 checklists7 pm: too few checklists (26969) to judge8 pm: too few checklists (12427) to judge9 pm: too few checklists (3658) to judge10 pm: too few checklists (1500) to judge11 pm: too few checklists (834) to judge12a3a6a9a12p3p6p9p
Share of checklists started in each local hour that reported it. It reflects when people go birding as well as when birds are active. Grey hours have too few checklists (under 2% of the state’s, or under 200) to judge.
Week-by-week table
MonthDays 1-78-1415-2122-end
January1.4%1.3%1.5%1.3%
February1.2%1.0%0.9%1.0%
March0.8%0.8%0.9%0.7%
April0.6%0.8%0.7%0.9%
May1.0%0.5%0.5%0.2%
June0.1%0.1%0.1%0.1%
July0.1%0.2%0.6%0.8%
August0.8%1.1%1.4%2.3%
September2.3%2.3%2.0%1.3%
October0.9%0.9%1.1%1.3%
November1.3%1.5%1.3%1.5%
December1.6%1.2%0.9%1.1%

Neighboring states

  • Oregon: arrives mid July, in the same week than Washington
  • California: arrives mid July, in the same week than Washington
  • Colorado: arrives early August, 2 weeks later than Washington
  • North Dakota: arrives early May, 10 weeks earlier than Washington

Common questions

When do Sanderlings arrive in Washington?
Sanderlings arrive in Washington in mid July, peak in early September (2.3% of checklists), and most are gone by the second week of May.
When do Sanderlings leave Washington?
Most Sanderlings have left Washington by the second week of May, when reports fall below half their usual rate.
When is the best time to see a Sanderling in Washington?
The Sanderling is reported most often in early September, on about 2.3% of Washington checklists.
Where in Washington are Sanderlings seen most often?
By county, Grays Harbor County, Pacific County, and Clallam County have the highest peak reporting rates for the Sanderling (counties with at least 200 checklists).