WhenToBird

Nyctanassa violacea · Ardeidae

When Do Yellow-crowned Night Herons Arrive in New York?

Adult Yellow-crowned Night-Heron
Photo: Michelle W. （鍾偉瑋）, CC BY 4.0 via iNaturalist

Yellow-crowned Night Herons arrive in New York in the second week of May, peak in early August (2.2% of checklists), and most are gone by late September.

When to look

First arrivalsMay 8-14the second week of May
Common byMay 8-14the second week of May
PeakAug 1-7early August
Most gone bySep 22-30late September

Best: early August. First arrivals the second week of May; most are gone by late September. Peak: on about 2.2% of New York checklists.

  1. Jannot usually seen
  2. Febnot usually seen
  3. Marrare
  4. Apruncommon
  5. Maycommon
  6. Juncommon
  7. Julpeak season
  8. Augpeak season
  9. Sepcommon
  10. Octuncommon
  11. Novnot usually seen
  12. Decnot usually seen

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

0%1%2%3%Jan 1-7: 0.1% of 66410 checklistsJan 8-14: 0.1% of 49310 checklistsJan 15-21: 0.1% of 49919 checklistsJan 22-31: 0.1% of 62513 checklistsFeb 1-7: 0.1% of 43526 checklistsFeb 8-14: 0.1% of 49753 checklistsFeb 15-21: 0.1% of 65147 checklistsFeb 22-28: 0.1% of 50173 checklistsMar 1-7: 0.1% of 50325 checklistsMar 8-14: 0.1% of 55371 checklistsMar 15-21: 0.1% of 56293 checklistsMar 22-31: 0.2% of 82677 checklistsApr 1-7: 0.2% of 65295 checklistsApr 8-14: 0.3% of 73080 checklistsApr 15-21: 0.3% of 73857 checklistsApr 22-30: 0.4% of 106093 checklistsMay 1-7: 0.5% of 102772 checklistsMay 8-14: 0.7% of 110051 checklistsMay 15-21: 1.0% of 94797 checklistsMay 22-31: 1.2% of 101272 checklistsJun 1-7: 1.4% of 59471 checklistsJun 8-14: 1.4% of 55497 checklistsJun 15-21: 1.5% of 51761 checklistsJun 22-30: 1.3% of 59219 checklistsJul 1-7: 1.4% of 48226 checklistsJul 8-14: 1.9% of 42315 checklistsJul 15-21: 2.0% of 40637 checklistsJul 22-31: 2.1% of 57183 checklistsAug 1-7: 2.1% of 40461 checklistsAug 8-14: 2.3% of 39880 checklistsAug 15-21: 2.0% of 41146 checklistsAug 22-31: 1.6% of 63381 checklistsSep 1-7: 1.1% of 48640 checklistsSep 8-14: 1.0% of 47882 checklistsSep 15-21: 0.9% of 49063 checklistsSep 22-30: 0.9% of 57906 checklistsOct 1-7: 0.7% of 48447 checklistsOct 8-14: 0.5% of 51901 checklistsOct 15-21: 0.3% of 46717 checklistsOct 22-31: 0.1% of 61992 checklistsNov 1-7: 0.1% of 44593 checklistsNov 8-14: 0.1% of 42566 checklistsNov 15-21: 0.1% of 39675 checklistsNov 22-30: 0.1% of 51197 checklistsDec 1-7: 0.1% of 36567 checklistsDec 8-14: 0.1% of 37254 checklistsDec 15-21: 0.1% of 43754 checklistsDec 22-31: 0.1% of 62470 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 New York 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 New York

Best counties

Share of checklists at the peak
  1. Nassau CountyBest the second week of July · 1101 checklists that week, 95,019 in all19%
  2. Kings CountyBest mid July · 1334 checklists that week, 134,897 in all18%
  3. Queens CountyBest mid July · 1071 checklists that week, 76,201 in all14%
  4. Richmond CountyBest the second week of August · 1016 checklists that week, 55,926 in all10%
  5. Bronx CountyBest early July · 263 checklists that week, 24,489 in all3.7%
  6. New York CountyBest mid July · 1575 checklists that week, 187,471 in all2.6%

Best spots

Share of checklists at the peak
  1. Parsonage CoveNassau County, best the second week of June · 155 checklists that week, 5,941 in all93%
  2. Titus Mill Pond State Tidal WetlandWestchester County, best mid April · 20 checklists that week, 166 in all91%
  3. Simmonds PondNassau County, best the second week of April · 33 checklists that week, 1,097 in all90%
  4. Oakwood BeachRichmond County, best the second week of August · 77 checklists that week, 588 in all90%
  5. Dreier-Offerman ParkKings County, best late July · 23 checklists that week, 1,849 in all89%
  6. Cow Meadow County ParkNassau County, best early June · 20 checklists that week, 530 in all89%

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

Best time of day

In New York, the Yellow-crowned Night Heron is most often listed on checklists started between 9 and 11 am (0.8% of those checklists).

0%0.5%1%1.5%12 am: too few checklists (1146) to judge1 am: too few checklists (1055) to judge2 am: too few checklists (1121) to judge3 am: too few checklists (1353) to judge4 am: too few checklists (4785) to judge5 am: too few checklists (32052) to judge6 am: 1.0% of 124869 checklists7 am: 0.5% of 298506 checklists8 am: 0.5% of 337334 checklists9 am: 0.9% of 307787 checklists10 am: 0.7% of 270801 checklists11 am: 0.7% of 233238 checklists12 pm: 0.6% of 213830 checklists1 pm: 0.6% of 193321 checklists2 pm: 0.5% of 180741 checklists3 pm: 0.4% of 170348 checklists4 pm: 0.9% of 147224 checklists5 pm: 0.5% of 111962 checklists6 pm: 0.6% of 78261 checklists7 pm: too few checklists (44425) to judge8 pm: too few checklists (15648) to judge9 pm: too few checklists (4795) to judge10 pm: too few checklists (2454) to judge11 pm: too few checklists (1378) 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%0.1%0.1%0.1%
February0.1%0.1%0.1%0.1%
March0.1%0.1%0.1%0.2%
April0.2%0.3%0.3%0.4%
May0.5%0.7%1.0%1.2%
June1.4%1.4%1.5%1.3%
July1.4%1.9%2.0%2.1%
August2.1%2.3%2.0%1.6%
September1.1%1.0%0.9%0.9%
October0.7%0.5%0.3%0.1%
November0.1%0.1%0.1%0.1%
December0.1%0.1%0.1%0.1%

Neighboring states

  • Connecticut: arrives the second week of May, in the same week than New York
  • New Jersey: arrives mid April, 3 weeks earlier than New York
  • Delaware: arrives mid June, 5 weeks later than New York
  • Rhode Island: arrives early July, 7 weeks later than New York

Common questions

When do Yellow-crowned Night Herons arrive in New York?
Yellow-crowned Night Herons arrive in New York in the second week of May, peak in early August (2.2% of checklists), and most are gone by late September.
When do Yellow-crowned Night Herons leave New York?
Most Yellow-crowned Night Herons have left New York by late September, when reports fall below half their usual rate.
When is the best time to see a Yellow-crowned Night Heron in New York?
The Yellow-crowned Night Heron is reported most often in early August, on about 2.2% of New York checklists.
Where in New York are Yellow-crowned Night Herons seen most often?
By county, Nassau County, Kings County, and Queens County have the highest peak reporting rates for the Yellow-crowned Night Heron (counties with at least 200 checklists).