WhenToBird

Cygnus olor · Anatidae

When Do Mute Swans Arrive in New Jersey?

Adult Mute Swan
Photo: Radu Teodoreanu, CC BY 4.0 via iNaturalist

The Mute Swan is in New Jersey all year. It turns up on about 15% of checklists at its peak (the second week of October) and on 6.7% in its quietest week (early July).

When to look

PresentAll year
Peak weekOct 8-14the second week of October
Quietest weekJul 1-7early July

Best: the second week of October. Here all year. Peak: on about 15% of New Jersey checklists.

  1. Jancommon
  2. Febcommon
  3. Marcommon
  4. Aprcommon
  5. Maycommon
  6. Juncommon
  7. Julcommon
  8. Augcommon
  9. Seppeak season
  10. Octpeak season
  11. Novpeak season
  12. Deccommon

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

0%5%10%15%20%Jan 1-7: 10% of 28167 checklistsJan 8-14: 10% of 20583 checklistsJan 15-21: 9.5% of 19739 checklistsJan 22-31: 9.1% of 24586 checklistsFeb 1-7: 8.8% of 17226 checklistsFeb 8-14: 7.4% of 19567 checklistsFeb 15-21: 7.8% of 26553 checklistsFeb 22-28: 10% of 19046 checklistsMar 1-7: 10% of 17969 checklistsMar 8-14: 11% of 18976 checklistsMar 15-21: 11% of 18581 checklistsMar 22-31: 11% of 27590 checklistsApr 1-7: 11% of 21202 checklistsApr 8-14: 11% of 23609 checklistsApr 15-21: 9.5% of 25056 checklistsApr 22-30: 9.8% of 36679 checklistsMay 1-7: 8.8% of 38378 checklistsMay 8-14: 9.3% of 44071 checklistsMay 15-21: 11% of 34076 checklistsMay 22-31: 8.9% of 32558 checklistsJun 1-7: 7.4% of 18049 checklistsJun 8-14: 7.2% of 15597 checklistsJun 15-21: 6.9% of 14894 checklistsJun 22-30: 6.6% of 17187 checklistsJul 1-7: 6.8% of 13406 checklistsJul 8-14: 6.6% of 12550 checklistsJul 15-21: 6.7% of 12358 checklistsJul 22-31: 7.1% of 18382 checklistsAug 1-7: 6.7% of 13689 checklistsAug 8-14: 6.9% of 14006 checklistsAug 15-21: 7.0% of 14483 checklistsAug 22-31: 7.3% of 23182 checklistsSep 1-7: 9.1% of 17984 checklistsSep 8-14: 11% of 18320 checklistsSep 15-21: 12% of 20491 checklistsSep 22-30: 14% of 26176 checklistsOct 1-7: 15% of 24112 checklistsOct 8-14: 15% of 24603 checklistsOct 15-21: 16% of 24549 checklistsOct 22-31: 14% of 26206 checklistsNov 1-7: 11% of 17469 checklistsNov 8-14: 11% of 15102 checklistsNov 15-21: 9.9% of 14958 checklistsNov 22-30: 10% of 19447 checklistsDec 1-7: 9.6% of 14017 checklistsDec 8-14: 9.1% of 14625 checklistsDec 15-21: 7.4% of 16937 checklistsDec 22-31: 7.9% 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. Salem CountyBest early December · 102 checklists that week, 9,658 in all33%
  2. Sussex CountyBest mid March · 620 checklists that week, 30,305 in all31%
  3. Cape May CountyBest late September · 9174 checklists that week, 189,832 in all30%
  4. Atlantic CountyBest mid October · 546 checklists that week, 28,208 in all27%
  5. Cumberland CountyBest mid April · 389 checklists that week, 13,927 in all26%
  6. Passaic CountyBest early March · 390 checklists that week, 24,933 in all20%

Best spots

Share of checklists at the peak
  1. Lake Musconetcong State ParkMorris County, best early March · 20 checklists that week, 688 in all100%
  2. Lake of the LilliesOcean County, best late September · 28 checklists that week, 2,803 in all100%
  3. Maple SwampGloucester County, best late February · 38 checklists that week, 665 in all99%
  4. Mount Hope LakeMorris County, best late March · 20 checklists that week, 265 in all98%
  5. Culvers LakeSussex County, best early December · 21 checklists that week, 710 in all98%
  6. Allamuchy Mountain State ParkSussex County, best late July · 22 checklists that week, 450 in all98%

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

Best time of day

In New Jersey, the Mute Swan is most often listed on checklists started between 10 am and 12 pm (11% of those checklists).

0%5%10%15%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: 7.7% of 50447 checklists7 am: 8.9% of 118312 checklists8 am: 9.2% of 123273 checklists9 am: 10% of 107783 checklists10 am: 11% of 97537 checklists11 am: 11% of 82427 checklists12 pm: 11% of 72581 checklists1 pm: 11% of 71478 checklists2 pm: 11% of 69994 checklists3 pm: 10% of 66822 checklists4 pm: 10% of 55950 checklists5 pm: 9.0% of 41360 checklists6 pm: 8.1% 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
January10%10%9.5%9.1%
February8.8%7.4%7.8%10%
March10%11%11%11%
April11%11%9.5%9.8%
May8.8%9.3%11%8.9%
June7.4%7.2%6.9%6.6%
July6.8%6.6%6.7%7.1%
August6.7%6.9%7.0%7.3%
September9.1%11%12%14%
October15%15%16%14%
November11%11%9.9%10%
December9.6%9.1%7.4%7.9%

Neighboring states

  • Delaware: all year, most in summer, peaks early April
  • Connecticut: year-round, peaks late March
  • Pennsylvania: winter visitor, peaks early March
  • New York: year-round, peaks the second week of January

Common questions

When do Mute Swans arrive in New Jersey?
The Mute Swan is in New Jersey all year. It turns up on about 15% of checklists at its peak (the second week of October) and on 6.7% in its quietest week (early July).
When do Mute Swans leave New Jersey?
The Mute Swan does not leave New Jersey: it is reported all year, from 6.7% of checklists in early July to 15% in the second week of October.
When is the best time to see a Mute Swan in New Jersey?
The Mute Swan is reported most often in the second week of October, on about 15% of New Jersey checklists.
Where in New Jersey are Mute Swans seen most often?
By county, Salem County, Sussex County, and Cape May County have the highest peak reporting rates for the Mute Swan (counties with at least 200 checklists).