WhenToBird

Cygnus columbianus · Anatidae

When Do Tundra Swans Arrive in California?

Adult Tundra Swan
Photo: Jan Ebr & Ivana Ebrová, CC BY 4.0 via iNaturalist

Tundra Swans are winter birds in California: they arrive in the second week of November, peak in mid January (1.1% of checklists), and most are gone by mid February.

When to look

First arrivalsNov 8-14the second week of November
Common byNov 8-14the second week of November
PeakJan 15-21mid January
Most gone byFeb 15-21mid February

Best: mid January. First arrivals the second week of November; most are gone by mid February. Peak: on about 1.1% of California checklists.

  1. Janpeak season
  2. Febpeak season
  3. Maruncommon
  4. Aprrare
  5. Maynot usually seen
  6. Junnot usually seen
  7. Julnot usually seen
  8. Augnot usually seen
  9. Sepnot usually seen
  10. Octuncommon
  11. Novpeak season
  12. Decpeak season

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

0%0.5%1%1.5%Jan 1-7: 1.1% of 112336 checklistsJan 8-14: 1.1% of 85518 checklistsJan 15-21: 1.1% of 86488 checklistsJan 22-31: 1.2% of 116174 checklistsFeb 1-7: 0.8% of 75171 checklistsFeb 8-14: 0.7% of 84467 checklistsFeb 15-21: 0.5% of 105683 checklistsFeb 22-28: 0.4% of 83396 checklistsMar 1-7: 0.3% of 77470 checklistsMar 8-14: 0.3% of 75180 checklistsMar 15-21: 0.2% of 80770 checklistsMar 22-31: 0.1% of 114116 checklistsApr 1-7: 0.1% of 84057 checklistsApr 8-14: 0.1% of 83692 checklistsApr 15-21: 0.1% of 89242 checklistsApr 22-30: 0.1% of 114289 checklistsMay 1-7: 0.1% of 85728 checklistsMay 8-14: 0.1% of 91984 checklistsMay 15-21: 0.1% of 75478 checklistsMay 22-31: 0.1% of 106250 checklistsJun 1-7: 0.1% of 70051 checklistsJun 8-14: 0.1% of 67485 checklistsJun 15-21: 0.1% of 66269 checklistsJun 22-30: 0.1% of 79172 checklistsJul 1-7: 0.1% of 62877 checklistsJul 8-14: 0.1% of 60328 checklistsJul 15-21: 0.1% of 59705 checklistsJul 22-31: 0.1% of 83796 checklistsAug 1-7: 0.1% of 60215 checklistsAug 8-14: 0.1% of 60172 checklistsAug 15-21: 0.1% of 59877 checklistsAug 22-31: 0.1% of 89107 checklistsSep 1-7: 0.1% of 72000 checklistsSep 8-14: 0.1% of 71228 checklistsSep 15-21: 0.1% of 76808 checklistsSep 22-30: 0.1% of 100204 checklistsOct 1-7: 0.1% of 76571 checklistsOct 8-14: 0.1% of 80874 checklistsOct 15-21: 0.1% of 74581 checklistsOct 22-31: 0.2% of 97498 checklistsNov 1-7: 0.4% of 70851 checklistsNov 8-14: 0.7% of 72431 checklistsNov 15-21: 0.8% of 66767 checklistsNov 22-30: 1.0% of 94737 checklistsDec 1-7: 1.0% of 65393 checklistsDec 8-14: 0.9% of 67449 checklistsDec 15-21: 0.9% of 83421 checklistsDec 22-31: 1.0% of 124993 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 California 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 California

Best counties

Share of checklists at the peak
  1. Yuba CountyBest late November · 162 checklists that week, 6,013 in all44%
  2. Sutter CountyBest mid November · 89 checklists that week, 4,996 in all41%
  3. Modoc CountyBest late January · 51 checklists that week, 6,138 in all30%
  4. Lassen CountyBest the second week of February · 103 checklists that week, 8,378 in all24%
  5. Glenn CountyBest the second week of December · 137 checklists that week, 5,189 in all16%
  6. San Joaquin CountyBest early December · 684 checklists that week, 33,237 in all14%

Best spots

Share of checklists at the peak
  1. Washoe CreekSonoma County, best late January · 30 checklists that week, 103 in all90%
  2. Staten IslandSan Joaquin County, best mid January · 67 checklists that week, 1,284 in all85%
  3. Triangle MarshHumboldt County, best early February · 51 checklists that week, 1,632 in all81%
  4. Holland TractContra Costa County, best mid January · 30 checklists that week, 361 in all81%

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

Best time of day

In California, the Tundra Swan is most often listed on checklists started between 2 and 4 pm (0.5% of those checklists).

0%0.5%1%12 am: too few checklists (1688) to judge1 am: too few checklists (1451) to judge2 am: too few checklists (1402) to judge3 am: too few checklists (1743) to judge4 am: too few checklists (4647) to judge5 am: too few checklists (32158) to judge6 am: 0.1% of 186053 checklists7 am: 0.2% of 444086 checklists8 am: 0.3% of 535846 checklists9 am: 0.3% of 486061 checklists10 am: 0.4% of 411130 checklists11 am: 0.4% of 325798 checklists12 pm: 0.4% of 269132 checklists1 pm: 0.5% of 244762 checklists2 pm: 0.5% of 235420 checklists3 pm: 0.5% of 232365 checklists4 pm: 0.5% of 208688 checklists5 pm: 0.2% of 146104 checklists6 pm: 0.1% of 96867 checklists7 pm: too few checklists (50942) to judge8 pm: too few checklists (14803) to judge9 pm: too few checklists (5561) to judge10 pm: too few checklists (3546) to judge11 pm: too few checklists (2092) 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
January1.1%1.1%1.1%1.2%
February0.8%0.7%0.5%0.4%
March0.3%0.3%0.2%0.1%
April0.1%0.1%0.1%0.1%
May0.1%0.1%0.1%0.1%
June0.1%0.1%0.1%0.1%
July0.1%0.1%0.1%0.1%
August0.1%0.1%0.1%0.1%
September0.1%0.1%0.1%0.1%
October0.1%0.1%0.1%0.2%
November0.4%0.7%0.8%1.0%
December1.0%0.9%0.9%1.0%

Neighboring states

  • Nevada: arrives late October, 2 weeks earlier than California
  • Utah: arrives early November, 1 week earlier than California
  • Oregon: arrives late October, 2 weeks earlier than California
  • Idaho: arrives mid January, 9 weeks later than California

Common questions

When do Tundra Swans arrive in California?
Tundra Swans are winter birds in California: they arrive in the second week of November, peak in mid January (1.1% of checklists), and most are gone by mid February.
When do Tundra Swans leave California?
Most Tundra Swans have left California by mid February, when reports fall below half their usual rate.
When is the best time to see a Tundra Swan in California?
The Tundra Swan is reported most often in mid January, on about 1.1% of California checklists.
Where in California are Tundra Swans seen most often?
By county, Yuba County, Sutter County, and Modoc County have the highest peak reporting rates for the Tundra Swan (counties with at least 200 checklists).