WhenToBird

Podilymbus podiceps · Podicipedidae

When Do Pied-billed Grebes Arrive in California?

Adult Pied-billed Grebe
Photo: Rodrigo Paiva Lázaro, CC BY 4.0 via iNaturalist

The Pied-billed Grebe is in California all year. It turns up on about 17% of checklists at its peak (late November) and on 6.7% in its quietest week (mid May).

When to look

PresentAll year
Peak weekNov 22-30late November
Quietest weekMay 15-21mid May

Best: late November. Here all year. Peak: on about 17% of California checklists.

  1. Janpeak season
  2. Febpeak season
  3. Marpeak season
  4. Aprcommon
  5. Maycommon
  6. Juncommon
  7. Julcommon
  8. Augcommon
  9. Sepcommon
  10. Octpeak season
  11. Novpeak season
  12. Decpeak season

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

0%5%10%15%20%Jan 1-7: 16% of 112336 checklistsJan 8-14: 16% of 85518 checklistsJan 15-21: 16% of 86488 checklistsJan 22-31: 15% of 116174 checklistsFeb 1-7: 14% of 75171 checklistsFeb 8-14: 13% of 84467 checklistsFeb 15-21: 12% of 105683 checklistsFeb 22-28: 13% of 83396 checklistsMar 1-7: 13% of 77470 checklistsMar 8-14: 12% of 75180 checklistsMar 15-21: 12% of 80770 checklistsMar 22-31: 11% of 114116 checklistsApr 1-7: 9.5% of 84057 checklistsApr 8-14: 8.6% of 83692 checklistsApr 15-21: 7.6% of 89242 checklistsApr 22-30: 7.1% of 114289 checklistsMay 1-7: 7.0% of 85728 checklistsMay 8-14: 6.6% of 91984 checklistsMay 15-21: 6.6% of 75478 checklistsMay 22-31: 6.8% of 106250 checklistsJun 1-7: 6.7% of 70051 checklistsJun 8-14: 7.1% of 67485 checklistsJun 15-21: 6.9% of 66269 checklistsJun 22-30: 7.6% of 79172 checklistsJul 1-7: 8.2% of 62877 checklistsJul 8-14: 8.0% of 60328 checklistsJul 15-21: 8.7% of 59705 checklistsJul 22-31: 9.4% of 83796 checklistsAug 1-7: 10% of 60215 checklistsAug 8-14: 11% of 60172 checklistsAug 15-21: 11% of 59877 checklistsAug 22-31: 12% of 89107 checklistsSep 1-7: 12% of 72000 checklistsSep 8-14: 12% of 71228 checklistsSep 15-21: 12% of 76808 checklistsSep 22-30: 12% of 100204 checklistsOct 1-7: 13% of 76571 checklistsOct 8-14: 13% of 80874 checklistsOct 15-21: 14% of 74581 checklistsOct 22-31: 15% of 97498 checklistsNov 1-7: 15% of 70851 checklistsNov 8-14: 16% of 72431 checklistsNov 15-21: 16% of 66767 checklistsNov 22-30: 17% of 94737 checklistsDec 1-7: 17% of 65393 checklistsDec 8-14: 16% of 67449 checklistsDec 15-21: 14% of 83421 checklistsDec 22-31: 15% 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. Lake CountyBest late December · 342 checklists that week, 12,989 in all34%
  2. Calaveras CountyBest mid November · 155 checklists that week, 6,843 in all33%
  3. Colusa CountyBest late November · 251 checklists that week, 7,653 in all33%
  4. Napa CountyBest early December · 322 checklists that week, 18,976 in all30%
  5. Fresno CountyBest the second week of December · 427 checklists that week, 29,788 in all29%
  6. Yolo CountyBest the second week of July · 732 checklists that week, 67,424 in all28%

Best spots

Share of checklists at the peak
  1. Los Gatos Creek ParkSanta Clara County, best early September · 24 checklists that week, 2,040 in all99%
  2. Coyote Creek ParkwaySanta Clara County, best late December · 20 checklists that week, 341 in all98%
  3. Santa Clara RiverVentura County, best the second week of November · 123 checklists that week, 5,820 in all98%
  4. Laguna Grande Regional ParkMonterey County, best mid July · 43 checklists that week, 4,654 in all97%
  5. Salt Pond (historical)Los Angeles County, best late October · 21 checklists that week, 776 in all96%

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

Best time of day

In California, the Pied-billed Grebe is most often listed on checklists started between 8 and 10 am (13% of those checklists).

0%5%10%15%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: 9.9% of 186053 checklists7 am: 13% of 444086 checklists8 am: 13% of 535846 checklists9 am: 13% of 486061 checklists10 am: 12% of 411130 checklists11 am: 12% of 325798 checklists12 pm: 12% of 269132 checklists1 pm: 12% of 244762 checklists2 pm: 12% of 235420 checklists3 pm: 12% of 232365 checklists4 pm: 10% of 208688 checklists5 pm: 8.5% of 146104 checklists6 pm: 7.0% 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
January16%16%16%15%
February14%13%12%13%
March13%12%12%11%
April9.5%8.6%7.6%7.1%
May7.0%6.6%6.6%6.8%
June6.7%7.1%6.9%7.6%
July8.2%8.0%8.7%9.4%
August10%11%11%12%
September12%12%12%12%
October13%13%14%15%
November15%16%16%17%
December17%16%14%15%

Neighboring states

  • Nevada: all year, most in winter, peaks mid November
  • Utah: all year, most in winter, peaks mid November
  • Arizona: all year, most in winter, peaks late November
  • Oregon: year-round, peaks early November

Common questions

When do Pied-billed Grebes arrive in California?
The Pied-billed Grebe is in California all year. It turns up on about 17% of checklists at its peak (late November) and on 6.7% in its quietest week (mid May).
When do Pied-billed Grebes leave California?
The Pied-billed Grebe does not leave California: it is reported all year, from 6.7% of checklists in mid May to 17% in late November.
When is the best time to see a Pied-billed Grebe in California?
The Pied-billed Grebe is reported most often in late November, on about 17% of California checklists.
Where in California are Pied-billed Grebes seen most often?
By county, Lake County, Calaveras County, and Colusa County have the highest peak reporting rates for the Pied-billed Grebe (counties with at least 200 checklists).