WhenToBird

Anser caerulescens · Anatidae

When Do Snow Geese Arrive in California?

Adult Snow Goose
Photo: sprcrkwild, CC BY 4.0 via iNaturalist

Snow Geese are winter birds in California: the first arrive in late October, they are common by early November, peak in mid January (3.2% of checklists), and most are gone by mid March.

When to look

First arrivalsOct 22-31late October
Common byNov 1-7early November
PeakJan 15-21mid January
Most gone byMar 15-21mid March

Best: mid January. First arrivals late October; most are gone by mid March. Peak: on about 3.2% of California checklists.

  1. Janpeak season
  2. Febpeak season
  3. Marcommon
  4. Apruncommon
  5. Mayrare
  6. Junrare
  7. Julrare
  8. Augnot usually seen
  9. Seprare
  10. Octuncommon
  11. Novpeak season
  12. Decpeak season

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

0%1%2%3%4%Jan 1-7: 3.1% of 112336 checklistsJan 8-14: 3.3% of 85518 checklistsJan 15-21: 3.3% of 86488 checklistsJan 22-31: 3.1% of 116174 checklistsFeb 1-7: 2.6% of 75171 checklistsFeb 8-14: 2.2% of 84467 checklistsFeb 15-21: 2.0% of 105683 checklistsFeb 22-28: 2.0% of 83396 checklistsMar 1-7: 1.9% of 77470 checklistsMar 8-14: 1.6% of 75180 checklistsMar 15-21: 1.4% of 80770 checklistsMar 22-31: 1.0% of 114116 checklistsApr 1-7: 0.7% of 84057 checklistsApr 8-14: 0.6% of 83692 checklistsApr 15-21: 0.5% of 89242 checklistsApr 22-30: 0.4% of 114289 checklistsMay 1-7: 0.2% of 85728 checklistsMay 8-14: 0.2% of 91984 checklistsMay 15-21: 0.2% of 75478 checklistsMay 22-31: 0.2% 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: 0.2% of 100204 checklistsOct 1-7: 0.2% of 76571 checklistsOct 8-14: 0.4% of 80874 checklistsOct 15-21: 0.7% of 74581 checklistsOct 22-31: 1.2% of 97498 checklistsNov 1-7: 1.6% of 70851 checklistsNov 8-14: 2.4% of 72431 checklistsNov 15-21: 2.5% of 66767 checklistsNov 22-30: 2.8% of 94737 checklistsDec 1-7: 3.1% of 65393 checklistsDec 8-14: 2.8% of 67449 checklistsDec 15-21: 2.6% of 83421 checklistsDec 22-31: 2.8% 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. Colusa CountyBest early January · 230 checklists that week, 7,653 in all56%
  2. Glenn CountyBest the second week of January · 145 checklists that week, 5,189 in all51%
  3. Sutter CountyBest mid January · 193 checklists that week, 4,996 in all40%
  4. Imperial CountyBest late November · 582 checklists that week, 24,551 in all36%
  5. Yuba CountyBest late November · 162 checklists that week, 6,013 in all27%
  6. Merced CountyBest mid January · 347 checklists that week, 13,095 in all26%

Best spots

Share of checklists at the peak
  1. Sonny Bono Salton Sea National Wildlife Refuge (Rock Hill)Imperial County, best early January · 59 checklists that week, 1,349 in all93%
  2. Colusa National Wildlife RefugeColusa County, best late February · 35 checklists that week, 1,370 in all93%
  3. Gray Lodge Wildlife AreaButte County, best early December · 41 checklists that week, 928 in all93%
  4. Sacramento National Wildlife Refuge (north)Glenn County, best late January · 22 checklists that week, 312 in all90%
  5. Colusa National Wildlife Refuge (Powell Slough)Colusa County, best early December · 35 checklists that week, 795 in all90%

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

Best time of day

In California, the Snow Goose is most often listed on checklists started between 1 and 3 pm (1.6% of those checklists).

0%0.5%1%1.5%2%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: 0.9% of 186053 checklists7 am: 1.1% of 444086 checklists8 am: 1.1% of 535846 checklists9 am: 1.2% of 486061 checklists10 am: 1.3% of 411130 checklists11 am: 1.4% of 325798 checklists12 pm: 1.5% of 269132 checklists1 pm: 1.6% of 244762 checklists2 pm: 1.6% of 235420 checklists3 pm: 1.6% of 232365 checklists4 pm: 1.4% of 208688 checklists5 pm: 0.6% of 146104 checklists6 pm: 0.3% 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
January3.1%3.3%3.3%3.1%
February2.6%2.2%2.0%2.0%
March1.9%1.6%1.4%1.0%
April0.7%0.6%0.5%0.4%
May0.2%0.2%0.2%0.2%
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%0.2%
October0.2%0.4%0.7%1.2%
November1.6%2.4%2.5%2.8%
December3.1%2.8%2.6%2.8%

Neighboring states

  • Nevada: arrives mid October, 1 week earlier than California
  • Utah: arrives early November, 1 week later than California
  • Arizona: arrives mid October, 1 week earlier than California
  • Oregon: arrives the second week of October, 2 weeks earlier than California

Common questions

When do Snow Geese arrive in California?
Snow Geese are winter birds in California: the first arrive in late October, they are common by early November, peak in mid January (3.2% of checklists), and most are gone by mid March.
When do Snow Geese leave California?
Most Snow Geese have left California by mid March, when reports fall below half their usual rate. Stragglers are still reported until late March.
When is the best time to see a Snow Goose in California?
The Snow Goose is reported most often in mid January, on about 3.2% of California checklists.
Where in California are Snow Geese seen most often?
By county, Colusa County, Glenn County, and Sutter County have the highest peak reporting rates for the Snow Goose (counties with at least 200 checklists).