WhenToBird

Phalacrocorax carbo · Phalacrocoracidae

When Do Great Cormorants Arrive in New York?

Adult Great Cormorant
Photo: bemma, CC BY 4.0 via iNaturalist

Great Cormorants are winter birds in New York: they arrive in late October, peak in mid January (1.4% of checklists), and most are gone by late March.

When to look

First arrivalsOct 22-31late October
Common byOct 22-31late October
PeakJan 15-21mid January
Most gone byMar 22-31late March

Best: mid January. First arrivals late October; most are gone by late March. Peak: on about 1.4% of New York checklists.

  1. Janpeak season
  2. Febpeak season
  3. Marcommon
  4. Apruncommon
  5. Maynot usually seen
  6. Junnot usually seen
  7. Julnot usually seen
  8. Augnot usually seen
  9. Seprare
  10. Octuncommon
  11. Novcommon
  12. Decpeak season

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

0%0.5%1%1.5%Jan 1-7: 1.1% of 66410 checklistsJan 8-14: 1.4% of 49310 checklistsJan 15-21: 1.5% of 49919 checklistsJan 22-31: 1.5% of 62513 checklistsFeb 1-7: 1.3% of 43526 checklistsFeb 8-14: 1.2% of 49753 checklistsFeb 15-21: 1.0% of 65147 checklistsFeb 22-28: 1.3% of 50173 checklistsMar 1-7: 1.1% of 50325 checklistsMar 8-14: 0.8% of 55371 checklistsMar 15-21: 0.8% of 56293 checklistsMar 22-31: 0.6% of 82677 checklistsApr 1-7: 0.3% of 65295 checklistsApr 8-14: 0.2% of 73080 checklistsApr 15-21: 0.1% of 73857 checklistsApr 22-30: 0.1% of 106093 checklistsMay 1-7: 0.1% of 102772 checklistsMay 8-14: 0.1% of 110051 checklistsMay 15-21: 0.1% of 94797 checklistsMay 22-31: 0.1% of 101272 checklistsJun 1-7: 0.1% of 59471 checklistsJun 8-14: 0.1% of 55497 checklistsJun 15-21: 0.1% of 51761 checklistsJun 22-30: 0.1% of 59219 checklistsJul 1-7: 0.1% of 48226 checklistsJul 8-14: 0.1% of 42315 checklistsJul 15-21: 0.1% of 40637 checklistsJul 22-31: 0.1% of 57183 checklistsAug 1-7: 0.1% of 40461 checklistsAug 8-14: 0.1% of 39880 checklistsAug 15-21: 0.1% of 41146 checklistsAug 22-31: 0.1% of 63381 checklistsSep 1-7: 0.1% of 48640 checklistsSep 8-14: 0.1% of 47882 checklistsSep 15-21: 0.1% of 49063 checklistsSep 22-30: 0.2% of 57906 checklistsOct 1-7: 0.2% of 48447 checklistsOct 8-14: 0.4% of 51901 checklistsOct 15-21: 0.4% of 46717 checklistsOct 22-31: 0.5% of 61992 checklistsNov 1-7: 0.5% of 44593 checklistsNov 8-14: 0.7% of 42566 checklistsNov 15-21: 0.7% of 39675 checklistsNov 22-30: 0.8% of 51197 checklistsDec 1-7: 0.9% of 36567 checklistsDec 8-14: 0.8% of 37254 checklistsDec 15-21: 0.9% of 43754 checklistsDec 22-31: 1.1% 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. Schuyler CountyBest mid November · 156 checklists that week, 12,381 in all11%
  2. Westchester CountyBest late January · 2625 checklists that week, 108,101 in all7.8%
  3. Bronx CountyBest early February · 408 checklists that week, 24,489 in all7.4%
  4. Richmond CountyBest the second week of January · 1298 checklists that week, 55,926 in all6.2%
  5. Kings CountyBest late January · 3096 checklists that week, 134,897 in all5.3%
  6. Queens CountyBest the second week of January · 1310 checklists that week, 76,201 in all4.8%

Best spots

Share of checklists at the peak
  1. Suffolk County Land (Orient Point)Suffolk County, best mid February · 26 checklists that week, 898 in all71%
  2. Steamboat Waterfront ParkWestchester County, best mid February · 28 checklists that week, 364 in all70%
  3. Vandeventers PointRichmond County, best the second week of November · 21 checklists that week, 712 in all69%
  4. Gateway National Recreation AreaQueens County, best mid January · 45 checklists that week, 1,841 in all68%
  5. Nyc Open Space 284New York County, best early February · 35 checklists that week, 3,525 in all68%
  6. Montauk Harbor (northeast)Suffolk County, best the second week of January · 22 checklists that week, 275 in all66%

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

Best time of day

In New York, the Great Cormorant is most often listed on checklists started between 11 am and 1 pm (0.6% of those checklists).

0%0.5%1%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: 0.3% of 124869 checklists7 am: 0.3% of 298506 checklists8 am: 0.3% of 337334 checklists9 am: 0.5% of 307787 checklists10 am: 0.6% of 270801 checklists11 am: 0.7% of 233238 checklists12 pm: 0.6% of 213830 checklists1 pm: 0.6% of 193321 checklists2 pm: 0.6% of 180741 checklists3 pm: 0.5% of 170348 checklists4 pm: 0.5% of 147224 checklists5 pm: 0.2% of 111962 checklists6 pm: 0.1% 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
January1.1%1.4%1.5%1.5%
February1.3%1.2%1.0%1.3%
March1.1%0.8%0.8%0.6%
April0.3%0.2%0.1%0.1%
May0.1%0.1%0.1%0.1%
June0.1%0.1%0.1%0.1%
July0.1%0.1%0.1%0.1%
August0.1%0.1%0.1%0.1%
September0.1%0.1%0.1%0.2%
October0.2%0.4%0.4%0.5%
November0.5%0.7%0.7%0.8%
December0.9%0.8%0.9%1.1%

Neighboring states

  • Connecticut: arrives mid November, 3 weeks later than New York
  • New Jersey: arrives mid October, 1 week earlier than New York
  • Delaware: arrives mid November, 3 weeks later than New York
  • Rhode Island: arrives the second week of September, 6 weeks earlier than New York

Common questions

When do Great Cormorants arrive in New York?
Great Cormorants are winter birds in New York: they arrive in late October, peak in mid January (1.4% of checklists), and most are gone by late March.
When do Great Cormorants leave New York?
Most Great Cormorants have left New York by late March, when reports fall below half their usual rate.
When is the best time to see a Great Cormorant in New York?
The Great Cormorant is reported most often in mid January, on about 1.4% of New York checklists.
Where in New York are Great Cormorants seen most often?
By county, Schuyler County, Westchester County, and Bronx County have the highest peak reporting rates for the Great Cormorant (counties with at least 200 checklists).