WhenToBird

Chaetura pelagica · Apodidae

Chimney Swift: When and Where to See It

Adult Chimney Swift
Photo: Ali Campbell, CC BY 4.0 via iNaturalist

The Chimney Swift reaches Louisiana first, around mid March, and Maine last, around early May.

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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0%5%10%15%Jan 1-7: 0% of 1114036 checklistsJan 8-14: 0% of 824708 checklistsJan 15-21: 0% of 825978 checklistsJan 22-31: 0% of 1105853 checklistsFeb 1-7: 0% of 779772 checklistsFeb 8-14: 0.1% of 864504 checklistsFeb 15-21: 0.1% of 1127933 checklistsFeb 22-28: 0.1% of 840124 checklistsMar 1-7: 0.1% of 839610 checklistsMar 8-14: 0.1% of 870138 checklistsMar 15-21: 0.1% of 898456 checklistsMar 22-31: 0.5% of 1335637 checklistsApr 1-7: 1.5% of 1030617 checklistsApr 8-14: 2.5% of 1124024 checklistsApr 15-21: 4.3% of 1194575 checklistsApr 22-30: 7.6% of 1675723 checklistsMay 1-7: 12% of 1449080 checklistsMay 8-14: 13% of 1538353 checklistsMay 15-21: 14% of 1219898 checklistsMay 22-31: 13% of 1452282 checklistsJun 1-7: 12% of 900636 checklistsJun 8-14: 11% of 829907 checklistsJun 15-21: 11% of 773255 checklistsJun 22-30: 10% of 916255 checklistsJul 1-7: 10% of 717733 checklistsJul 8-14: 10% of 658223 checklistsJul 15-21: 10% of 638752 checklistsJul 22-31: 10% of 895727 checklistsAug 1-7: 9.9% of 655651 checklistsAug 8-14: 9.2% of 650038 checklistsAug 15-21: 8.8% of 654639 checklistsAug 22-31: 8.7% of 974928 checklistsSep 1-7: 8.3% of 765914 checklistsSep 8-14: 7.8% of 738674 checklistsSep 15-21: 7.9% of 750433 checklistsSep 22-30: 7.9% of 944196 checklistsOct 1-7: 6.4% of 760106 checklistsOct 8-14: 3.3% of 793131 checklistsOct 15-21: 1.2% of 728727 checklistsOct 22-31: 0.3% of 959954 checklistsNov 1-7: 0.1% of 709464 checklistsNov 8-14: 0.1% of 693424 checklistsNov 15-21: 0.1% of 653952 checklistsNov 22-30: 0.1% of 871137 checklistsDec 1-7: 0.1% of 627591 checklistsDec 8-14: 0% of 642427 checklistsDec 15-21: 0.1% of 775638 checklistsDec 22-31: 0% of 1132751 checklistsJanFebMarAprMayJunJulAugSepOctNovDec
Share of complete checklists reporting it, by week (4 per month). Grey bars: fewer than 10 checklists, not counted.

Pooled across every state in the data, so it leans toward states with the most birders.

States, in order of first arrivals

StatePatternFirst arrivalsPeakMost gone byPeak %
LouisianaSummer visitorMar 15-21May 8-14Oct 1-728%
MississippiSummer visitorMar 15-21May 8-14Oct 1-728%
TexasSummer visitorMar 15-21May 8-14Oct 1-718%
GeorgiaSummer visitorMar 22-31May 8-14Oct 1-723%
AlabamaSummer visitorMar 22-31May 8-14Oct 1-722%
South CarolinaSummer visitorMar 22-31May 8-14Oct 1-721%
FloridaSummer visitorMar 22-31May 8-14Oct 1-716%
North CarolinaSummer visitorApr 1-7May 8-14Oct 1-723%
TennesseeSummer visitorApr 1-7May 15-21Oct 1-723%
ArkansasSummer visitorApr 1-7May 8-14Oct 1-714%
District of ColumbiaSummer visitorApr 8-14May 22-31Oct 8-1457%
MarylandSummer visitorApr 8-14May 22-31Oct 1-727%
KentuckySummer visitorApr 8-14May 15-21Oct 1-725%
VirginiaSummer visitorApr 8-14May 22-31Oct 1-725%
MissouriSummer visitorApr 8-14May 15-21Oct 8-1420%
DelawareSummer visitorApr 8-14Jun 1-7Oct 1-715%
OklahomaSummer visitorApr 8-14May 22-31Oct 1-714%
IllinoisSummer visitorApr 15-21Aug 8-14Oct 8-1427%
OhioSummer visitorApr 15-21Jun 1-7Oct 1-725%
Rhode IslandSummer visitorApr 15-21May 22-31Aug 22-3124%
New JerseySummer visitorApr 15-21May 22-31Sep 15-2122%
PennsylvaniaSummer visitorApr 15-21May 22-31Oct 1-722%
IndianaSummer visitorApr 15-21May 22-31Oct 1-719%
West VirginiaSummer visitorApr 15-21May 22-31Oct 1-719%
KansasSummer visitorApr 15-21May 22-31Oct 8-1416%
New YorkSummer visitorApr 15-21May 22-31Sep 22-3015%
NebraskaSummer visitorApr 15-21Jul 8-14Sep 22-3015%
IowaSummer visitorApr 15-21May 15-21Sep 15-2111%
MichiganSummer visitorApr 15-21Aug 1-7Sep 8-1411%
MassachusettsSummer visitorApr 22-30Jun 1-7Aug 22-3126%
ConnecticutSummer visitorApr 22-30Jun 1-7Sep 1-723%
MinnesotaSummer visitorApr 22-30May 22-31Aug 22-3110%
New HampshireSummer visitorApr 22-30Jun 1-7Aug 22-3112%
WisconsinSummer visitorApr 22-30Aug 1-7Sep 8-1411%
VermontSummer visitorApr 22-30Jun 8-14Aug 8-147.9%
South DakotaSummer visitorApr 22-30Aug 15-21Sep 1-75.4%
ColoradoSummer visitorApr 22-30May 15-21Sep 8-141.9%
North DakotaSummer visitorMay 1-7Aug 8-14Aug 22-317.8%
MaineSummer visitorMay 1-7May 22-31Aug 8-146.7%

Summer visitor in: Illinois, South Dakota, North Dakota