WhenToBird

Falco peregrinus · Falconidae

Peregrine Falcon: When and Where to See It

Adult Peregrine Falcon
Photo: Andrea Poggi, CC BY 4.0 via iNaturalist

The Peregrine Falcon reaches Arizona first, around late May, and District of Columbia last, around late September.

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%1%2%3%Jan 1-7: 1.1% of 1114036 checklistsJan 8-14: 1.1% of 824708 checklistsJan 15-21: 1.1% of 825978 checklistsJan 22-31: 1.1% of 1105853 checklistsFeb 1-7: 0.9% of 779772 checklistsFeb 8-14: 0.8% of 864504 checklistsFeb 15-21: 0.7% of 1127933 checklistsFeb 22-28: 0.8% of 840124 checklistsMar 1-7: 0.8% of 839610 checklistsMar 8-14: 0.8% of 870138 checklistsMar 15-21: 0.8% of 898456 checklistsMar 22-31: 0.7% of 1335637 checklistsApr 1-7: 0.7% of 1030617 checklistsApr 8-14: 0.7% of 1124024 checklistsApr 15-21: 0.7% of 1194575 checklistsApr 22-30: 0.7% of 1675723 checklistsMay 1-7: 0.7% of 1449080 checklistsMay 8-14: 0.6% of 1538353 checklistsMay 15-21: 0.6% of 1219898 checklistsMay 22-31: 0.5% of 1452282 checklistsJun 1-7: 0.5% of 900636 checklistsJun 8-14: 0.5% of 829907 checklistsJun 15-21: 0.5% of 773255 checklistsJun 22-30: 0.6% of 916255 checklistsJul 1-7: 0.6% of 717733 checklistsJul 8-14: 0.7% of 658223 checklistsJul 15-21: 0.7% of 638752 checklistsJul 22-31: 0.8% of 895727 checklistsAug 1-7: 1.0% of 655651 checklistsAug 8-14: 1.1% of 650038 checklistsAug 15-21: 1.3% of 654639 checklistsAug 22-31: 1.4% of 974928 checklistsSep 1-7: 1.5% of 765914 checklistsSep 8-14: 1.5% of 738674 checklistsSep 15-21: 1.8% of 750433 checklistsSep 22-30: 2.2% of 944196 checklistsOct 1-7: 2.3% of 760106 checklistsOct 8-14: 2.2% of 793131 checklistsOct 15-21: 1.8% of 728727 checklistsOct 22-31: 1.5% of 959954 checklistsNov 1-7: 1.4% of 709464 checklistsNov 8-14: 1.3% of 693424 checklistsNov 15-21: 1.3% of 653952 checklistsNov 22-30: 1.2% of 871137 checklistsDec 1-7: 1.1% of 627591 checklistsDec 8-14: 1.1% of 642427 checklistsDec 15-21: 1.1% of 775638 checklistsDec 22-31: 1.0% 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 %
IdahoSummer visitorJan 22-31Aug 22-31Dec 22-311.2%
VermontSummer visitorFeb 15-21Sep 22-30Nov 15-211.7%
MinnesotaSummer visitorFeb 22-28Sep 22-30Nov 1-72.0%
New HampshireSummer visitorFeb 22-28Aug 22-31Feb 1-71.9%
UtahSummer visitorFeb 22-28Aug 8-14Oct 15-211.6%
IndianaSummer visitorMar 1-7Sep 22-30Feb 1-71.4%
New MexicoSummer visitorMar 8-14Sep 15-21Oct 22-311.4%
ColoradoSummer visitorMar 15-21Sep 1-7Oct 1-71.1%
North DakotaSummer visitorMar 15-21May 1-7May 22-311.2%
MontanaSummer visitorMar 22-31Sep 8-14Oct 1-71.6%
WyomingSummer visitorApr 1-7Aug 15-21Sep 22-301.3%
AlaskaSummer visitorApr 8-14Sep 8-14Oct 15-212.7%
KentuckySummer visitorApr 15-21Aug 8-14Apr 1-71.3%
ArizonaSummer visitorMay 22-31Sep 22-30Mar 22-312.6%
NevadaSummer visitorJun 8-14Sep 8-14May 15-212.4%
OregonSummer visitorJun 15-21Sep 15-21May 15-212.3%
ConnecticutSummer visitorJul 1-7Sep 15-21Jun 15-213.2%
WashingtonSummer visitorJul 8-14Sep 22-30May 8-142.4%
Rhode IslandSummer visitorJul 15-21Sep 22-30Feb 1-73.1%
IowaSummer visitorJul 15-21Sep 22-30Oct 22-311.6%
WisconsinSummer visitorJul 15-21Sep 22-30May 15-211.4%
MaineSummer visitorAug 1-7Sep 22-30Oct 22-313.6%
FloridaPasses throughSep 15-21Oct 8-14Nov 1-73.9%
GeorgiaPasses throughSep 15-21Oct 1-7Oct 22-311.1%
South CarolinaPasses throughSep 15-21Oct 1-7Oct 22-311.9%
CaliforniaWinter visitorMay 22-31Nov 8-14Mar 8-143.4%
IllinoisWinter visitorJun 15-21Oct 1-7May 22-313.0%
New JerseyWinter visitorJul 1-7Oct 1-7Nov 15-2110%
MichiganWinter visitorJul 1-7Oct 1-7May 22-311.2%
MassachusettsWinter visitorJul 8-14Oct 1-7May 22-313.0%
New YorkWinter visitorJul 8-14Oct 1-7Apr 22-303.0%
MarylandWinter visitorJul 8-14Oct 8-14Apr 15-211.5%
OhioWinter visitorJul 8-14Oct 1-7Apr 8-141.3%
DelawareWinter visitorJul 22-31Oct 1-7Nov 15-215.9%
PennsylvaniaWinter visitorJul 22-31Oct 1-7Apr 8-141.5%
MississippiWinter visitorAug 15-21Oct 1-7Feb 8-141.1%
VirginiaWinter visitorAug 15-21Oct 1-7Mar 22-311.8%
North CarolinaWinter visitorSep 1-7Oct 8-14Jan 22-311.5%
AlabamaWinter visitorSep 15-21Oct 8-14Feb 1-71.7%
LouisianaWinter visitorSep 15-21Nov 1-7May 1-71.3%
TexasWinter visitorSep 15-21Nov 8-14Apr 22-301.3%
District of ColumbiaWinter visitorSep 22-30Dec 8-14Mar 22-312.8%

Summer visitor in: North Dakota, Idaho, Vermont, Minnesota, New Hampshire, Utah, Indiana, New Mexico, Colorado, Montana, Wyoming, Alaska, Kentucky