WhenToBird

Spizella passerina · Passerellidae

When Do Chipping Sparrows Arrive in California?

Adult Chipping Sparrow
Photo: Shirley Zundell, CC BY 4.0 via iNaturalist

Chipping Sparrows are winter birds in California: the first arrive in late August, they are common by early September, peak in early October (3.1% of checklists), and most are gone by mid July.

When to look

First arrivalsAug 22-31late August
Common bySep 1-7early September
PeakOct 1-7early October
Most gone byJul 15-21mid July

Best: early October. First arrivals late August; most are gone by mid July. Peak: on about 3.1% of California checklists.

  1. Jancommon
  2. Febcommon
  3. Marcommon
  4. Aprpeak season
  5. Maypeak season
  6. Junpeak season
  7. Julpeak season
  8. Augcommon
  9. Seppeak season
  10. Octpeak season
  11. Novcommon
  12. Deccommon

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

0%1%2%3%4%Jan 1-7: 1.3% of 112336 checklistsJan 8-14: 1.5% of 85518 checklistsJan 15-21: 1.3% of 86488 checklistsJan 22-31: 1.5% of 116174 checklistsFeb 1-7: 1.5% of 75171 checklistsFeb 8-14: 1.4% of 84467 checklistsFeb 15-21: 1.3% of 105683 checklistsFeb 22-28: 1.5% of 83396 checklistsMar 1-7: 1.6% of 77470 checklistsMar 8-14: 1.7% of 75180 checklistsMar 15-21: 1.9% of 80770 checklistsMar 22-31: 2.3% of 114116 checklistsApr 1-7: 2.8% of 84057 checklistsApr 8-14: 3.1% of 83692 checklistsApr 15-21: 3.1% of 89242 checklistsApr 22-30: 2.9% of 114289 checklistsMay 1-7: 2.6% of 85728 checklistsMay 8-14: 2.3% of 91984 checklistsMay 15-21: 2.3% of 75478 checklistsMay 22-31: 2.5% of 106250 checklistsJun 1-7: 2.7% of 70051 checklistsJun 8-14: 3.1% of 67485 checklistsJun 15-21: 3.0% of 66269 checklistsJun 22-30: 3.0% of 79172 checklistsJul 1-7: 2.4% of 62877 checklistsJul 8-14: 1.9% of 60328 checklistsJul 15-21: 1.5% of 59705 checklistsJul 22-31: 1.3% of 83796 checklistsAug 1-7: 1.1% of 60215 checklistsAug 8-14: 1.2% of 60172 checklistsAug 15-21: 1.1% of 59877 checklistsAug 22-31: 1.2% of 89107 checklistsSep 1-7: 1.5% of 72000 checklistsSep 8-14: 2.0% of 71228 checklistsSep 15-21: 2.3% of 76808 checklistsSep 22-30: 3.2% of 100204 checklistsOct 1-7: 3.4% of 76571 checklistsOct 8-14: 2.8% of 80874 checklistsOct 15-21: 2.6% of 74581 checklistsOct 22-31: 2.1% of 97498 checklistsNov 1-7: 1.8% of 70851 checklistsNov 8-14: 1.6% of 72431 checklistsNov 15-21: 1.4% of 66767 checklistsNov 22-30: 1.4% of 94737 checklistsDec 1-7: 1.4% of 65393 checklistsDec 8-14: 1.4% of 67449 checklistsDec 15-21: 1.6% of 83421 checklistsDec 22-31: 1.5% 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. Sierra CountyBest late May · 549 checklists that week, 8,945 in all21%
  2. Lassen CountyBest late May · 384 checklists that week, 8,378 in all18%
  3. Alpine CountyBest mid June · 270 checklists that week, 6,013 in all16%
  4. Modoc CountyBest early September · 236 checklists that week, 6,138 in all15%
  5. San Bernardino CountyBest early October · 1538 checklists that week, 84,093 in all15%
  6. Tuolumne CountyBest the second week of June · 532 checklists that week, 21,159 in all14%

Best spots

Share of checklists at the peak
  1. TJ Martin ParkSanta Clara County, best late January · 91 checklists that week, 483 in all86%
  2. Yosemite National Park (Ackerson Meadow)Tuolumne County, best late June · 29 checklists that week, 409 in all83%
  3. Harry Griffen ParkSan Diego County, best late March · 46 checklists that week, 1,959 in all82%
  4. Swanson MeadowFresno County, best early June · 21 checklists that week, 136 in all80%
  5. Inyo National Forest (Wildrose Canyon)Mono County, best early July · 24 checklists that week, 250 in all79%
  6. Cleveland National Forest (Los Pinos Spring)Orange County, best late May · 23 checklists that week, 346 in all78%

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

Best time of day

In California, the Chipping Sparrow is most often listed on checklists started between 6 and 8 am (3.1% of those checklists).

0%1%2%3%4%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: 3.2% of 186053 checklists7 am: 3.0% of 444086 checklists8 am: 2.6% of 535846 checklists9 am: 2.1% of 486061 checklists10 am: 1.9% of 411130 checklists11 am: 1.7% of 325798 checklists12 pm: 1.6% of 269132 checklists1 pm: 1.5% of 244762 checklists2 pm: 1.4% of 235420 checklists3 pm: 1.5% of 232365 checklists4 pm: 1.3% of 208688 checklists5 pm: 1.3% of 146104 checklists6 pm: 1.0% 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
January1.3%1.5%1.3%1.5%
February1.5%1.4%1.3%1.5%
March1.6%1.7%1.9%2.3%
April2.8%3.1%3.1%2.9%
May2.6%2.3%2.3%2.5%
June2.7%3.1%3.0%3.0%
July2.4%1.9%1.5%1.3%
August1.1%1.2%1.1%1.2%
September1.5%2.0%2.3%3.2%
October3.4%2.8%2.6%2.1%
November1.8%1.6%1.4%1.4%
December1.4%1.4%1.6%1.5%

Neighboring states

  • Nevada: arrives late March, 20 weeks earlier than California
  • Utah: arrives the second week of April, 18 weeks earlier than California
  • Arizona: arrives late August, in the same week than California
  • Oregon: arrives early April, 19 weeks earlier than California

Common questions

When do Chipping Sparrows arrive in California?
Chipping Sparrows are winter birds in California: the first arrive in late August, they are common by early September, peak in early October (3.1% of checklists), and most are gone by mid July.
When do Chipping Sparrows leave California?
Most Chipping Sparrows have left California by mid July, when reports fall below half their usual rate. Stragglers are still reported until early August.
When is the best time to see a Chipping Sparrow in California?
The Chipping Sparrow is reported most often in early October, on about 3.1% of California checklists.
Where in California are Chipping Sparrows seen most often?
By county, Sierra County, Lassen County, and Alpine County have the highest peak reporting rates for the Chipping Sparrow (counties with at least 200 checklists).