WhenToBird

Pyrocephalus rubinus · Tyrannidae

When Do Vermilion Flycatchers Arrive in California?

Adult male Vermilion Flycatcher
Photo: Jared Shorma, CC BY 4.0 via iNaturalist

Vermilion Flycatchers are winter birds in California: the first arrive in the second week of August, they are common by the second week of September, peak in late November (1.7% of checklists), and most are gone by early May.

When to look

First arrivalsAug 8-14the second week of August
Common bySep 8-14the second week of September
PeakNov 22-30late November
Most gone byMay 1-7early May

Best: late November. First arrivals the second week of August; most are gone by early May. Peak: on about 1.7% of California checklists.

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

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

0%0.5%1%1.5%2%Jan 1-7: 1.7% of 112336 checklistsJan 8-14: 1.5% of 85518 checklistsJan 15-21: 1.4% of 86488 checklistsJan 22-31: 1.5% of 116174 checklistsFeb 1-7: 1.3% of 75171 checklistsFeb 8-14: 1.1% of 84467 checklistsFeb 15-21: 1.1% of 105683 checklistsFeb 22-28: 1.3% of 83396 checklistsMar 1-7: 1.2% of 77470 checklistsMar 8-14: 1.2% of 75180 checklistsMar 15-21: 1.2% of 80770 checklistsMar 22-31: 1.1% of 114116 checklistsApr 1-7: 0.9% of 84057 checklistsApr 8-14: 0.9% of 83692 checklistsApr 15-21: 0.9% of 89242 checklistsApr 22-30: 1.0% of 114289 checklistsMay 1-7: 0.9% of 85728 checklistsMay 8-14: 0.8% of 91984 checklistsMay 15-21: 0.8% of 75478 checklistsMay 22-31: 0.9% of 106250 checklistsJun 1-7: 0.7% of 70051 checklistsJun 8-14: 0.7% of 67485 checklistsJun 15-21: 0.6% of 66269 checklistsJun 22-30: 0.6% of 79172 checklistsJul 1-7: 0.6% of 62877 checklistsJul 8-14: 0.5% of 60328 checklistsJul 15-21: 0.6% of 59705 checklistsJul 22-31: 0.6% of 83796 checklistsAug 1-7: 0.6% of 60215 checklistsAug 8-14: 0.6% of 60172 checklistsAug 15-21: 0.7% of 59877 checklistsAug 22-31: 0.7% of 89107 checklistsSep 1-7: 0.7% of 72000 checklistsSep 8-14: 1.0% of 71228 checklistsSep 15-21: 1.1% of 76808 checklistsSep 22-30: 1.1% of 100204 checklistsOct 1-7: 1.2% of 76571 checklistsOct 8-14: 1.3% of 80874 checklistsOct 15-21: 1.2% of 74581 checklistsOct 22-31: 1.3% of 97498 checklistsNov 1-7: 1.4% of 70851 checklistsNov 8-14: 1.5% of 72431 checklistsNov 15-21: 1.6% of 66767 checklistsNov 22-30: 1.8% of 94737 checklistsDec 1-7: 1.8% of 65393 checklistsDec 8-14: 1.6% of 67449 checklistsDec 15-21: 1.5% of 83421 checklistsDec 22-31: 1.7% 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 February · 239 checklists that week, 7,653 in all17%
  2. San Bernardino CountyBest late April · 3085 checklists that week, 84,093 in all13%
  3. Riverside CountyBest early December · 2230 checklists that week, 113,541 in all12%
  4. Imperial CountyBest early December · 322 checklists that week, 24,551 in all8.1%
  5. Orange CountyBest early December · 4345 checklists that week, 244,559 in all7.5%
  6. Merced CountyBest mid November · 278 checklists that week, 13,095 in all3.7%

Best spots

Share of checklists at the peak
  1. Ruth Hardy ParkRiverside County, best late May · 28 checklists that week, 876 in all98%
  2. Demuth ParkRiverside County, best early December · 27 checklists that week, 907 in all92%
  3. Lake Cahuilla Recreation AreaRiverside County, best the second week of November · 25 checklists that week, 501 in all91%
  4. Prado Regional ParkSan Bernardino County, best late September · 24 checklists that week, 1,313 in all91%

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

Best time of day

In California, the Vermilion Flycatcher is most often listed on checklists started between 6 and 8 am (1.7% 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: 1.7% of 186053 checklists7 am: 1.7% of 444086 checklists8 am: 1.4% of 535846 checklists9 am: 1.1% of 486061 checklists10 am: 1.0% of 411130 checklists11 am: 1.0% of 325798 checklists12 pm: 0.9% of 269132 checklists1 pm: 0.9% of 244762 checklists2 pm: 0.9% of 235420 checklists3 pm: 0.9% of 232365 checklists4 pm: 0.7% of 208688 checklists5 pm: 0.6% of 146104 checklists6 pm: 0.5% 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
January1.7%1.5%1.4%1.5%
February1.3%1.1%1.1%1.3%
March1.2%1.2%1.2%1.1%
April0.9%0.9%0.9%1.0%
May0.9%0.8%0.8%0.9%
June0.7%0.7%0.6%0.6%
July0.6%0.5%0.6%0.6%
August0.6%0.6%0.7%0.7%
September0.7%1.0%1.1%1.1%
October1.2%1.3%1.2%1.3%
November1.4%1.5%1.6%1.8%
December1.8%1.6%1.5%1.7%

Neighboring states

  • Nevada: arrives mid August, 1 week later than California
  • Arizona: year-round, peaks mid March
  • New Mexico: arrives the second week of March, 20 weeks earlier than California
  • Texas: year-round, peaks the second week of November

Common questions

When do Vermilion Flycatchers arrive in California?
Vermilion Flycatchers are winter birds in California: the first arrive in the second week of August, they are common by the second week of September, peak in late November (1.7% of checklists), and most are gone by early May.
When do Vermilion Flycatchers leave California?
Most Vermilion Flycatchers have left California by early May, when reports fall below half their usual rate. Stragglers are still reported until mid June.
When is the best time to see a Vermilion Flycatcher in California?
The Vermilion Flycatcher is reported most often in late November, on about 1.7% of California checklists.
Where in California are Vermilion Flycatchers seen most often?
By county, Colusa County, San Bernardino County, and Riverside County have the highest peak reporting rates for the Vermilion Flycatcher (counties with at least 200 checklists).