WhenToBird

Stelgidopteryx serripennis · Hirundinidae

Northern Rough-winged Swallow: When and Where to See It

Adult Northern Rough-winged Swallow
Photo: Peter Chen 2.0, CC BY 4.0 via iNaturalist

The Northern Rough-winged Swallow reaches California first, around the second week of February, and North Dakota last, around late April.

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: 0.3% of 1114036 checklistsJan 8-14: 0.3% of 824708 checklistsJan 15-21: 0.3% of 825978 checklistsJan 22-31: 0.3% of 1105853 checklistsFeb 1-7: 0.4% of 779772 checklistsFeb 8-14: 0.5% of 864504 checklistsFeb 15-21: 0.6% of 1127933 checklistsFeb 22-28: 1.1% of 840124 checklistsMar 1-7: 1.5% of 839610 checklistsMar 8-14: 2.0% of 870138 checklistsMar 15-21: 2.7% of 898456 checklistsMar 22-31: 3.7% of 1335637 checklistsApr 1-7: 5.2% of 1030617 checklistsApr 8-14: 6.6% of 1124024 checklistsApr 15-21: 8.6% of 1194575 checklistsApr 22-30: 10% of 1675723 checklistsMay 1-7: 10% of 1449080 checklistsMay 8-14: 9.7% of 1538353 checklistsMay 15-21: 9.2% of 1219898 checklistsMay 22-31: 8.2% of 1452282 checklistsJun 1-7: 7.2% of 900636 checklistsJun 8-14: 7.0% of 829907 checklistsJun 15-21: 6.8% of 773255 checklistsJun 22-30: 6.4% of 916255 checklistsJul 1-7: 6.0% of 717733 checklistsJul 8-14: 5.5% of 658223 checklistsJul 15-21: 4.8% of 638752 checklistsJul 22-31: 4.2% of 895727 checklistsAug 1-7: 3.7% of 655651 checklistsAug 8-14: 3.3% of 650038 checklistsAug 15-21: 2.9% of 654639 checklistsAug 22-31: 2.4% of 974928 checklistsSep 1-7: 2.0% of 765914 checklistsSep 8-14: 1.5% of 738674 checklistsSep 15-21: 1.2% of 750433 checklistsSep 22-30: 1.2% of 944196 checklistsOct 1-7: 1.1% of 760106 checklistsOct 8-14: 0.9% of 793131 checklistsOct 15-21: 0.8% of 728727 checklistsOct 22-31: 0.6% of 959954 checklistsNov 1-7: 0.4% of 709464 checklistsNov 8-14: 0.4% of 693424 checklistsNov 15-21: 0.3% of 653952 checklistsNov 22-30: 0.3% of 871137 checklistsDec 1-7: 0.3% of 627591 checklistsDec 8-14: 0.2% of 642427 checklistsDec 15-21: 0.2% of 775638 checklistsDec 22-31: 0.2% 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 %
CaliforniaSummer visitorFeb 8-14Apr 22-30Jul 8-1413%
ArizonaAll year, most in springFeb 15-21Mar 15-21Jun 15-2116%
TexasSummer visitorFeb 15-21Apr 8-14Jul 8-144.9%
New MexicoSummer visitorFeb 22-28Apr 22-30Aug 22-3111%
GeorgiaSummer visitorMar 1-7Apr 15-21Jul 1-721%
AlabamaSummer visitorMar 1-7May 1-7Sep 22-3011%
MississippiSummer visitorMar 1-7Apr 8-14Oct 1-78.9%
NevadaAll year, most in springMar 8-14Apr 15-21May 15-2119%
TennesseeSummer visitorMar 8-14Apr 22-30Jul 8-1419%
North CarolinaSummer visitorMar 8-14Apr 22-30Jun 22-3014%
UtahSummer visitorMar 8-14May 1-7Sep 1-713%
ArkansasSummer visitorMar 8-14Apr 22-30Oct 1-79.1%
South CarolinaSummer visitorMar 8-14Apr 22-30Jun 22-309.3%
District of ColumbiaSummer visitorMar 15-21Jun 8-14Jul 8-1420%
KansasSummer visitorMar 15-21Apr 22-30Sep 1-715%
PennsylvaniaSummer visitorMar 15-21Apr 22-30Aug 1-715%
KentuckySummer visitorMar 15-21Apr 22-30Aug 15-2114%
MarylandSummer visitorMar 15-21Apr 22-30Aug 22-3112%
MissouriSummer visitorMar 15-21Apr 22-30Sep 22-3011%
VirginiaSummer visitorMar 15-21Apr 22-30Sep 22-3010%
OklahomaSummer visitorMar 15-21Apr 15-21Sep 22-304.7%
OhioSummer visitorMar 22-31Apr 22-30Aug 8-1415%
IdahoSummer visitorMar 22-31May 8-14Aug 15-2115%
IndianaSummer visitorMar 22-31May 1-7Aug 8-1414%
New JerseySummer visitorMar 22-31Apr 22-30Aug 1-713%
West VirginiaSummer visitorMar 22-31May 1-7Jul 22-3114%
ConnecticutSummer visitorMar 22-31May 1-7Jul 15-2112%
DelawareSummer visitorMar 22-31Apr 22-30Aug 1-76.6%
IllinoisSummer visitorApr 1-7May 8-14Aug 15-2117%
Rhode IslandSummer visitorApr 1-7Jun 22-30Jul 22-3112%
New YorkSummer visitorApr 1-7May 1-7Jul 22-317.8%
WashingtonSummer visitorApr 1-7May 15-21Aug 8-148.5%
MassachusettsSummer visitorApr 1-7May 1-7Jul 15-217.1%
OregonSummer visitorApr 1-7May 8-14Aug 15-215.6%
ColoradoSummer visitorApr 8-14May 8-14Aug 8-1411%
IowaSummer visitorApr 8-14May 8-14Sep 1-710%
MontanaSummer visitorApr 8-14May 15-21Aug 15-2111%
NebraskaSummer visitorApr 8-14May 8-14Aug 8-1411%
WisconsinSummer visitorApr 8-14May 8-14Aug 1-711%
MichiganSummer visitorApr 8-14May 1-7Aug 1-79.4%
New HampshireSummer visitorApr 8-14May 1-7Jul 15-214.8%
VermontSummer visitorApr 8-14May 1-7Jul 22-314.0%
South DakotaSummer visitorApr 15-21May 15-21Aug 8-148.0%
WyomingSummer visitorApr 15-21May 15-21Aug 15-218.6%
MinnesotaSummer visitorApr 15-21May 8-14Jul 22-316.1%
MaineSummer visitorApr 15-21May 1-7Jul 22-312.0%
North DakotaSummer visitorApr 22-30May 22-31Jul 22-316.2%
FloridaSummer visitorDec 15-21Apr 8-14Jun 22-302.7%
LouisianaWinter visitorMar 1-7Oct 8-14Nov 1-76.9%

Winter visitor in: Louisiana

Summer visitor in: Florida