WhenToBird

Setophaga fusca · Parulidae

When Do Blackburnian Warblers Arrive in Florida?

Adult male Blackburnian Warbler
Photo: Matt Felperin, CC BY 4.0 via iNaturalist

Blackburnian Warblers mostly pass through Florida: they arrive in early September, peak in mid September (3.0% of checklists), and most are gone by mid October.

When to look

First arrivalsSep 1-7early September
Common bySep 1-7early September
PeakSep 15-21mid September
Most gone byOct 15-21mid October

Best: mid September. First arrivals early September; most are gone by mid October. Peak: on about 3.0% of Florida checklists.

  1. Jannot usually seen
  2. Febnot usually seen
  3. Marnot usually seen
  4. Aprrare
  5. Mayrare
  6. Junnot usually seen
  7. Julnot usually seen
  8. Auguncommon
  9. Seppeak season
  10. Octpeak season
  11. Novrare
  12. Decnot usually seen

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

0%1%2%3%4%Jan 1-7: 0.1% of 74446 checklistsJan 8-14: 0% of 60074 checklistsJan 15-21: 0% of 62945 checklistsJan 22-31: 0% of 84954 checklistsFeb 1-7: 0% of 59204 checklistsFeb 8-14: 0% of 63259 checklistsFeb 15-21: 0% of 77150 checklistsFeb 22-28: 0.1% of 62850 checklistsMar 1-7: 0% of 58560 checklistsMar 8-14: 0% of 57756 checklistsMar 15-21: 0.1% of 54898 checklistsMar 22-31: 0.1% of 76702 checklistsApr 1-7: 0.1% of 55096 checklistsApr 8-14: 0.1% of 55892 checklistsApr 15-21: 0.3% of 59358 checklistsApr 22-30: 0.4% of 73124 checklistsMay 1-7: 0.5% of 47915 checklistsMay 8-14: 0.1% of 44114 checklistsMay 15-21: 0.1% of 31858 checklistsMay 22-31: 0.1% of 40723 checklistsJun 1-7: 0% of 31668 checklistsJun 8-14: 0% of 27802 checklistsJun 15-21: 0% of 26698 checklistsJun 22-30: 0% of 32346 checklistsJul 1-7: 0% of 23826 checklistsJul 8-14: 0% of 23071 checklistsJul 15-21: 0% of 22903 checklistsJul 22-31: 0% of 32952 checklistsAug 1-7: 0.1% of 25093 checklistsAug 8-14: 0.1% of 24888 checklistsAug 15-21: 0.2% of 26030 checklistsAug 22-31: 0.6% of 38612 checklistsSep 1-7: 1.7% of 31023 checklistsSep 8-14: 3.1% of 30022 checklistsSep 15-21: 2.9% of 31611 checklistsSep 22-30: 2.9% of 42108 checklistsOct 1-7: 2.4% of 36219 checklistsOct 8-14: 1.9% of 43113 checklistsOct 15-21: 1.7% of 40987 checklistsOct 22-31: 0.6% of 53457 checklistsNov 1-7: 0.1% of 38587 checklistsNov 8-14: 0.1% of 39208 checklistsNov 15-21: 0.1% of 39729 checklistsNov 22-30: 0.1% of 54965 checklistsDec 1-7: 0.1% of 42070 checklistsDec 8-14: 0% of 43424 checklistsDec 15-21: 0% of 50581 checklistsDec 22-31: 0.1% of 82405 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 Florida 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 Florida

Best counties

Share of checklists at the peak
  1. Lafayette CountyBest late September · 26 checklists that week, 1,203 in all13%
  2. Franklin CountyBest mid September · 256 checklists that week, 20,336 in all9.7%
  3. Pasco CountyBest the second week of September · 491 checklists that week, 33,431 in all9.6%
  4. Pinellas CountyBest mid September · 2152 checklists that week, 148,901 in all8.0%
  5. Washington CountyBest early October · 24 checklists that week, 1,773 in all7.9%
  6. Union CountyBest early October · 20 checklists that week, 661 in all5.9%

Best spots

Share of checklists at the peak
  1. Rattlesnake CoveFranklin County, best mid September · 29 checklists that week, 2,246 in all37%
  2. Sawgrass LakePinellas County, best the second week of September · 158 checklists that week, 3,762 in all34%
  3. Clear LakeAlachua County, best mid September · 25 checklists that week, 290 in all29%
  4. Cambier ParkCollier County, best mid September · 28 checklists that week, 1,000 in all29%
  5. Datsko ParkPinellas County, best mid September · 22 checklists that week, 136 in all28%

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

Best time of day

In Florida, the Blackburnian Warbler is most often listed on checklists started between 7 and 9 am (0.5% of those checklists).

0%0.5%1%12 am: too few checklists (771) to judge1 am: too few checklists (771) to judge2 am: too few checklists (701) to judge3 am: too few checklists (752) to judge4 am: too few checklists (1378) to judge5 am: too few checklists (9462) to judge6 am: 0.2% of 94591 checklists7 am: 0.5% of 296183 checklists8 am: 0.5% of 319987 checklists9 am: 0.4% of 254830 checklists10 am: 0.3% of 209480 checklists11 am: 0.3% of 163924 checklists12 pm: 0.3% of 133478 checklists1 pm: 0.3% of 125012 checklists2 pm: 0.2% of 125299 checklists3 pm: 0.3% of 131072 checklists4 pm: 0.3% of 134410 checklists5 pm: 0.3% of 113373 checklists6 pm: 0.2% of 69886 checklists7 pm: too few checklists (37509) to judge8 pm: too few checklists (8966) to judge9 pm: too few checklists (2093) to judge10 pm: too few checklists (1485) to judge11 pm: too few checklists (862) 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
January0.1%0%0%0%
February0%0%0%0.1%
March0%0%0.1%0.1%
April0.1%0.1%0.3%0.4%
May0.5%0.1%0.1%0.1%
June0%0%0%0%
July0%0%0%0%
August0.1%0.1%0.2%0.6%
September1.7%3.1%2.9%2.9%
October2.4%1.9%1.7%0.6%
November0.1%0.1%0.1%0.1%
December0.1%0%0%0.1%

Neighboring states

  • Georgia: arrives late August, 1 week earlier than Florida
  • South Carolina: arrives late August, 1 week earlier than Florida
  • Alabama: arrives mid August, 2 weeks earlier than Florida
  • Mississippi: arrives mid April, 18 weeks earlier than Florida

Common questions

When do Blackburnian Warblers arrive in Florida?
Blackburnian Warblers mostly pass through Florida: they arrive in early September, peak in mid September (3.0% of checklists), and most are gone by mid October.
When do Blackburnian Warblers leave Florida?
Most Blackburnian Warblers have left Florida by mid October, when reports fall below half their usual rate.
When is the best time to see a Blackburnian Warbler in Florida?
The Blackburnian Warbler is reported most often in mid September, on about 3.0% of Florida checklists.
Where in Florida are Blackburnian Warblers seen most often?
By county, Lafayette County, Franklin County, and Pasco County have the highest peak reporting rates for the Blackburnian Warbler (counties with at least 200 checklists).