WhenToBird

Larus brachyrhynchus · Laridae

When Do Short-billed Gulls Arrive in Washington?

Adult Short-billed Gull
Photo: Алексей Ябс, CC0 1.0 via iNaturalist

Short-billed Gulls are winter birds in Washington: the first arrive in mid July, they are common by early September, peak in early November (14% of checklists), and most are gone by mid April.

When to look

First arrivalsJul 15-21mid July
Common bySep 1-7early September
PeakNov 1-7early November
Most gone byApr 15-21mid April

Best: early November. First arrivals mid July; most are gone by mid April. Peak: on about 14% of Washington checklists.

  1. Janpeak season
  2. Febpeak season
  3. Marcommon
  4. Aprcommon
  5. Mayuncommon
  6. Junnot usually seen
  7. Julrare
  8. Auguncommon
  9. Sepcommon
  10. Octpeak season
  11. Novpeak season
  12. Decpeak season

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

0%5%10%15%Jan 1-7: 12% of 41928 checklistsJan 8-14: 12% of 31152 checklistsJan 15-21: 12% of 31753 checklistsJan 22-31: 12% of 42530 checklistsFeb 1-7: 11% of 29739 checklistsFeb 8-14: 9.2% of 32746 checklistsFeb 15-21: 8.7% of 40328 checklistsFeb 22-28: 9.9% of 28432 checklistsMar 1-7: 9.6% of 30758 checklistsMar 8-14: 8.8% of 29368 checklistsMar 15-21: 8.5% of 32580 checklistsMar 22-31: 6.8% of 45614 checklistsApr 1-7: 7.0% of 33997 checklistsApr 8-14: 6.9% of 34729 checklistsApr 15-21: 5.9% of 38474 checklistsApr 22-30: 4.4% of 52185 checklistsMay 1-7: 2.2% of 44236 checklistsMay 8-14: 0.9% of 48708 checklistsMay 15-21: 0.4% 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: 0.2% of 31949 checklistsJul 8-14: 0.4% of 29086 checklistsJul 15-21: 0.8% of 28045 checklistsJul 22-31: 1.7% of 38275 checklistsAug 1-7: 2.8% of 28846 checklistsAug 8-14: 3.5% of 28036 checklistsAug 15-21: 4.1% of 27614 checklistsAug 22-31: 4.6% of 40356 checklistsSep 1-7: 5.4% of 31214 checklistsSep 8-14: 6.1% of 27795 checklistsSep 15-21: 6.7% of 29677 checklistsSep 22-30: 7.1% of 35241 checklistsOct 1-7: 9.4% of 28605 checklistsOct 8-14: 11% of 28655 checklistsOct 15-21: 13% of 24643 checklistsOct 22-31: 15% of 34874 checklistsNov 1-7: 14% of 25658 checklistsNov 8-14: 14% of 25700 checklistsNov 15-21: 13% of 24331 checklistsNov 22-30: 13% of 32784 checklistsDec 1-7: 13% of 24099 checklistsDec 8-14: 12% of 23339 checklistsDec 15-21: 11% of 27666 checklistsDec 22-31: 11% 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.

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Where in Washington

Best counties

Share of checklists at the peak
  1. Jefferson CountyBest late October · 1299 checklists that week, 59,663 in all48%
  2. Clallam CountyBest early November · 1414 checklists that week, 85,362 in all27%
  3. Mason CountyBest the second week of November · 545 checklists that week, 27,853 in all26%
  4. San Juan CountyBest the second week of October · 542 checklists that week, 35,337 in all25%
  5. Kitsap CountyBest late October · 1640 checklists that week, 74,545 in all22%
  6. Pierce CountyBest late October · 1817 checklists that week, 92,224 in all20%

Best spots

Share of checklists at the peak
  1. Marine Community ParkClark County, best mid October · 29 checklists that week, 471 in all90%
  2. Yellow IslandSan Juan County, best mid March · 20 checklists that week, 757 in all88%
  3. Marysville Sewage LagoonSnohomish County, best early December · 37 checklists that week, 1,523 in all88%
  4. False BaySan Juan County, best early February · 20 checklists that week, 1,097 in all85%
  5. West PointKing County, best early October · 40 checklists that week, 1,527 in all83%

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

Best time of day

In Washington, the Short-billed Gull is most often listed on checklists started between 1 and 3 pm (8.0% of those checklists).

0%5%10%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: 5.0% of 56744 checklists7 am: 6.9% of 133294 checklists8 am: 6.8% of 184196 checklists9 am: 7.0% of 186303 checklists10 am: 7.5% of 177063 checklists11 am: 7.6% of 154936 checklists12 pm: 7.5% of 138061 checklists1 pm: 8.1% of 127449 checklists2 pm: 7.9% of 121511 checklists3 pm: 7.3% of 107793 checklists4 pm: 5.4% of 82862 checklists5 pm: 3.5% of 57183 checklists6 pm: 2.2% 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
January12%12%12%12%
February11%9.2%8.7%9.9%
March9.6%8.8%8.5%6.8%
April7.0%6.9%5.9%4.4%
May2.2%0.9%0.4%0.2%
June0.1%0.1%0.1%0.1%
July0.2%0.4%0.8%1.7%
August2.8%3.5%4.1%4.6%
September5.4%6.1%6.7%7.1%
October9.4%11%13%15%
November14%14%13%13%
December13%12%11%11%

Neighboring states

  • Oregon: arrives early October, 10 weeks later than Washington
  • California: arrives late October, 13 weeks later than Washington
  • Alaska: arrives mid April, 12 weeks earlier than Washington

Common questions

When do Short-billed Gulls arrive in Washington?
Short-billed Gulls are winter birds in Washington: the first arrive in mid July, they are common by early September, peak in early November (14% of checklists), and most are gone by mid April.
When do Short-billed Gulls leave Washington?
Most Short-billed Gulls have left Washington by mid April, when reports fall below half their usual rate. Stragglers are still reported until the second week of May.
When is the best time to see a Short-billed Gull in Washington?
The Short-billed Gull is reported most often in early November, on about 14% of Washington checklists.
Where in Washington are Short-billed Gulls seen most often?
By county, Jefferson County, Clallam County, and Mason County have the highest peak reporting rates for the Short-billed Gull (counties with at least 200 checklists).