WhenToBird

Nycticorax nycticorax · Ardeidae

Black-crowned Night Heron: When and Where to See It

Adult Black-crowned Night-Heron
Photo: jubileej, CC0 1.0 via iNaturalist

The Black-crowned Night Heron reaches Alabama first, around late February, and Vermont last, around the second week of 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%1%2%3%Jan 1-7: 1.9% of 1114036 checklistsJan 8-14: 1.9% of 824708 checklistsJan 15-21: 1.9% of 825978 checklistsJan 22-31: 1.9% of 1105853 checklistsFeb 1-7: 1.7% of 779772 checklistsFeb 8-14: 1.5% of 864504 checklistsFeb 15-21: 1.3% of 1127933 checklistsFeb 22-28: 1.6% of 840124 checklistsMar 1-7: 1.4% of 839610 checklistsMar 8-14: 1.3% of 870138 checklistsMar 15-21: 1.3% of 898456 checklistsMar 22-31: 1.3% of 1335637 checklistsApr 1-7: 1.4% of 1030617 checklistsApr 8-14: 1.5% of 1124024 checklistsApr 15-21: 1.7% of 1194575 checklistsApr 22-30: 1.8% of 1675723 checklistsMay 1-7: 1.7% of 1449080 checklistsMay 8-14: 1.8% of 1538353 checklistsMay 15-21: 2.0% of 1219898 checklistsMay 22-31: 2.1% of 1452282 checklistsJun 1-7: 2.1% of 900636 checklistsJun 8-14: 2.2% of 829907 checklistsJun 15-21: 2.3% of 773255 checklistsJun 22-30: 2.4% of 916255 checklistsJul 1-7: 2.5% of 717733 checklistsJul 8-14: 2.6% of 658223 checklistsJul 15-21: 2.6% of 638752 checklistsJul 22-31: 2.7% of 895727 checklistsAug 1-7: 2.8% of 655651 checklistsAug 8-14: 2.8% of 650038 checklistsAug 15-21: 2.7% of 654639 checklistsAug 22-31: 2.6% of 974928 checklistsSep 1-7: 2.4% of 765914 checklistsSep 8-14: 2.2% of 738674 checklistsSep 15-21: 2.0% of 750433 checklistsSep 22-30: 1.9% of 944196 checklistsOct 1-7: 1.8% of 760106 checklistsOct 8-14: 1.6% of 793131 checklistsOct 15-21: 1.6% of 728727 checklistsOct 22-31: 1.5% of 959954 checklistsNov 1-7: 1.6% of 709464 checklistsNov 8-14: 1.7% of 693424 checklistsNov 15-21: 1.6% of 653952 checklistsNov 22-30: 1.8% of 871137 checklistsDec 1-7: 1.8% of 627591 checklistsDec 8-14: 1.7% of 642427 checklistsDec 15-21: 1.6% of 775638 checklistsDec 22-31: 1.8% 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 %
AlabamaSummer visitorFeb 22-28Aug 15-21Feb 8-141.7%
IdahoSummer visitorMar 22-31Aug 8-14Jan 8-143.0%
Rhode IslandSummer visitorMar 22-31Jul 1-7Sep 15-215.0%
DelawareSummer visitorMar 22-31Jul 1-7Mar 1-71.9%
MarylandSummer visitorMar 22-31May 22-31Sep 22-301.9%
TennesseeSummer visitorMar 22-31Jul 22-31Oct 1-71.6%
New JerseySummer visitorApr 1-7Jul 15-21Oct 15-215.1%
IllinoisSummer visitorApr 1-7Jul 22-31Sep 22-304.9%
MassachusettsSummer visitorApr 1-7Aug 8-14Sep 22-303.8%
UtahSummer visitorApr 1-7May 8-14Oct 1-73.7%
ColoradoSummer visitorApr 8-14May 15-21Sep 22-303.2%
ConnecticutSummer visitorApr 8-14Jul 1-7Oct 8-144.1%
New YorkSummer visitorApr 8-14Jul 15-21Oct 1-74.1%
MinnesotaSummer visitorApr 8-14Apr 22-30Sep 15-211.1%
MississippiSummer visitorApr 8-14Aug 15-21Mar 8-141.2%
KentuckySummer visitorApr 15-21Aug 8-14Sep 15-213.9%
KansasSummer visitorApr 15-21Sep 1-7Oct 1-71.9%
MaineSummer visitorApr 15-21May 8-14Sep 15-211.3%
MichiganSummer visitorApr 15-21Aug 8-14Oct 1-71.7%
OhioSummer visitorApr 15-21Aug 8-14Oct 1-71.8%
South DakotaSummer visitorApr 15-21Aug 1-7Oct 8-142.2%
WyomingSummer visitorApr 15-21May 8-14Sep 1-71.5%
IndianaSummer visitorApr 22-30Aug 15-21Oct 8-141.3%
MissouriSummer visitorApr 22-30Jul 8-14Aug 22-311.4%
OklahomaSummer visitorApr 22-30Aug 15-21Oct 8-142.2%
WisconsinSummer visitorApr 22-30Aug 8-14Sep 22-302.2%
North DakotaSummer visitorMay 8-14Jul 15-21Aug 15-213.3%
VermontSummer visitorMay 8-14Aug 1-7Sep 8-141.0%
District of ColumbiaSummer visitorNov 15-21May 22-31Jul 15-215.3%
New MexicoSummer visitorNov 15-21May 22-31Sep 22-302.9%
HawaiiYear-round–Nov 8-14–18%
NevadaYear-round–Dec 1-7–11%
CaliforniaYear-round–Aug 8-14–8.6%
ArizonaYear-round–Jan 8-14–5.4%
FloridaYear-round–Jun 1-7–4.7%
South CarolinaYear-round–Jul 22-31–4.4%
LouisianaYear-round–Jul 8-14–3.9%
TexasYear-round–Jan 8-14–3.8%
GeorgiaYear-round–Oct 8-14–1.5%

Summer visitor in: Utah, Colorado, Minnesota, Maine, Wyoming, District of Columbia, New Mexico