WhenToBird

Calidris alpina · Scolopacidae

When Do Dunlins Arrive in New Jersey?

Adult Dunlin
Photo: Paulo Martins, CC BY-SA 4.0 via iNaturalist

Dunlins reach New Jersey in late September, are common by early October, peak in mid May (5.4% of checklists), and most are gone by early June.

When to look

First arrivalsSep 22-30late September
Common byOct 1-7early October
PeakMay 15-21mid May
Most gone byJun 1-7early June

Best: mid May. First arrivals late September; most are gone by early June. Peak: on about 5.4% of New Jersey checklists.

  1. Jancommon
  2. Febcommon
  3. Marcommon
  4. Aprcommon
  5. Maypeak season
  6. Juncommon
  7. Julnot usually seen
  8. Augnot usually seen
  9. Sepuncommon
  10. Octpeak season
  11. Novpeak season
  12. Deccommon

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

0%2%4%6%8%Jan 1-7: 3.3% of 28167 checklistsJan 8-14: 3.4% of 20583 checklistsJan 15-21: 3.5% of 19739 checklistsJan 22-31: 2.9% of 24586 checklistsFeb 1-7: 2.6% of 17226 checklistsFeb 8-14: 2.1% of 19567 checklistsFeb 15-21: 1.7% of 26553 checklistsFeb 22-28: 2.3% of 19046 checklistsMar 1-7: 2.0% of 17969 checklistsMar 8-14: 2.0% of 18976 checklistsMar 15-21: 1.9% of 18581 checklistsMar 22-31: 2.4% of 27590 checklistsApr 1-7: 2.3% of 21202 checklistsApr 8-14: 2.0% of 23609 checklistsApr 15-21: 2.0% of 25056 checklistsApr 22-30: 2.3% of 36679 checklistsMay 1-7: 2.9% of 38378 checklistsMay 8-14: 4.7% of 44071 checklistsMay 15-21: 7.4% of 34076 checklistsMay 22-31: 4.3% of 32558 checklistsJun 1-7: 0.8% of 18049 checklistsJun 8-14: 0.2% of 15597 checklistsJun 15-21: 0.1% of 14894 checklistsJun 22-30: 0.1% of 17187 checklistsJul 1-7: 0.1% of 13406 checklistsJul 8-14: 0.1% of 12550 checklistsJul 15-21: 0.1% of 12358 checklistsJul 22-31: 0.1% of 18382 checklistsAug 1-7: 0.1% of 13689 checklistsAug 8-14: 0.1% of 14006 checklistsAug 15-21: 0.1% of 14483 checklistsAug 22-31: 0.2% of 23182 checklistsSep 1-7: 0.1% of 17984 checklistsSep 8-14: 0.3% of 18320 checklistsSep 15-21: 0.4% of 20491 checklistsSep 22-30: 1.3% of 26176 checklistsOct 1-7: 2.4% of 24112 checklistsOct 8-14: 3.2% of 24603 checklistsOct 15-21: 4.8% of 24549 checklistsOct 22-31: 4.8% of 26206 checklistsNov 1-7: 4.5% of 17469 checklistsNov 8-14: 3.4% of 15102 checklistsNov 15-21: 3.1% of 14958 checklistsNov 22-30: 2.7% of 19447 checklistsDec 1-7: 2.9% of 14017 checklistsDec 8-14: 2.6% of 14625 checklistsDec 15-21: 3.0% of 16937 checklistsDec 22-31: 3.1% of 26651 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 Jersey 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 Jersey

Best counties

Share of checklists at the peak
  1. Cumberland CountyBest the second week of May · 995 checklists that week, 13,927 in all43%
  2. Atlantic CountyBest the second week of November · 399 checklists that week, 28,208 in all18%
  3. Cape May CountyBest mid January · 2533 checklists that week, 189,832 in all15%
  4. Ocean CountyBest early December · 1486 checklists that week, 87,340 in all9.9%
  5. Bergen CountyBest mid May · 2152 checklists that week, 73,457 in all5.0%
  6. Monmouth CountyBest early November · 1203 checklists that week, 79,748 in all4.1%

Best spots

Share of checklists at the peak
  1. Norburys LandingCape May County, best late February · 29 checklists that week, 667 in all98%
  2. Cape May Coastal Wetlands Wildlife Management Area (Jarvis Sound)Cape May County, best mid May · 33 checklists that week, 340 in all91%
  3. Heislerville Wildlife Management AreaCumberland County, best the second week of May · 148 checklists that week, 1,554 in all89%
  4. Heislerville Wildlife Management Area (west)Cumberland County, best the second week of May · 107 checklists that week, 627 in all89%
  5. Fishing CreekCape May County, best early February · 35 checklists that week, 999 in all88%
  6. Wilmas PondCumberland County, best the second week of May · 26 checklists that week, 298 in all80%

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

Best time of day

In New Jersey, the Dunlin is most often listed on checklists started between 1 and 3 pm (3.3% of those checklists).

0%1%2%3%4%12 am: too few checklists (746) to judge1 am: too few checklists (640) to judge2 am: too few checklists (606) to judge3 am: too few checklists (755) to judge4 am: too few checklists (1681) to judge5 am: too few checklists (11258) to judge6 am: 1.9% of 50447 checklists7 am: 1.8% of 118312 checklists8 am: 1.8% of 123273 checklists9 am: 2.3% of 107783 checklists10 am: 2.9% of 97537 checklists11 am: 2.8% of 82427 checklists12 pm: 2.8% of 72581 checklists1 pm: 3.4% of 71478 checklists2 pm: 3.2% of 69994 checklists3 pm: 2.8% of 66822 checklists4 pm: 2.8% of 55950 checklists5 pm: 2.1% of 41360 checklists6 pm: 1.7% of 28122 checklists7 pm: too few checklists (14727) to judge8 pm: too few checklists (4257) to judge9 pm: too few checklists (1273) to judge10 pm: too few checklists (920) to judge11 pm: too few checklists (693) 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
January3.3%3.4%3.5%2.9%
February2.6%2.1%1.7%2.3%
March2.0%2.0%1.9%2.4%
April2.3%2.0%2.0%2.3%
May2.9%4.7%7.4%4.3%
June0.8%0.2%0.1%0.1%
July0.1%0.1%0.1%0.1%
August0.1%0.1%0.1%0.2%
September0.1%0.3%0.4%1.3%
October2.4%3.2%4.8%4.8%
November4.5%3.4%3.1%2.7%
December2.9%2.6%3.0%3.1%

Neighboring states

  • Delaware: arrives mid September, 1 week earlier than New Jersey
  • Connecticut: arrives late September, in the same week than New Jersey
  • Pennsylvania: arrives the second week of September, 2 weeks earlier than New Jersey
  • New York: arrives mid September, 1 week earlier than New Jersey

Common questions

When do Dunlins arrive in New Jersey?
Dunlins reach New Jersey in late September, are common by early October, peak in mid May (5.4% of checklists), and most are gone by early June.
When do Dunlins leave New Jersey?
Most Dunlins have left New Jersey by early June, when reports fall below half their usual rate.
When is the best time to see a Dunlin in New Jersey?
The Dunlin is reported most often in mid May, on about 5.4% of New Jersey checklists.
Where in New Jersey are Dunlins seen most often?
By county, Cumberland County, Atlantic County, and Cape May County have the highest peak reporting rates for the Dunlin (counties with at least 200 checklists).