WhenToBird

Cygnus olor · Anatidae

When Do Mute Swans Arrive in Massachusetts?

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

The Mute Swan is in Massachusetts all year. It turns up on about 13% of checklists at its peak (mid March) and on 6.3% in its quietest week (the second week of August).

When to look

PresentAll year
Peak weekMar 15-21mid March
Quietest weekAug 8-14the second week of August

Best: mid March. Here all year. Peak: on about 13% of Massachusetts checklists.

  1. Janpeak season
  2. Febpeak season
  3. Marpeak season
  4. Aprpeak season
  5. Maycommon
  6. Juncommon
  7. Julcommon
  8. Augcommon
  9. Sepcommon
  10. Octpeak season
  11. Novpeak season
  12. Decpeak season

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

0%5%10%15%Jan 1-7: 11% of 43252 checklistsJan 8-14: 11% of 30096 checklistsJan 15-21: 10% of 28760 checklistsJan 22-31: 10% of 38135 checklistsFeb 1-7: 11% of 26442 checklistsFeb 8-14: 10% of 29034 checklistsFeb 15-21: 9.6% of 37383 checklistsFeb 22-28: 13% of 29977 checklistsMar 1-7: 13% of 29175 checklistsMar 8-14: 14% of 32399 checklistsMar 15-21: 14% of 34444 checklistsMar 22-31: 13% of 49126 checklistsApr 1-7: 13% of 36456 checklistsApr 8-14: 12% of 40908 checklistsApr 15-21: 11% of 42078 checklistsApr 22-30: 11% of 56465 checklistsMay 1-7: 9.5% of 56994 checklistsMay 8-14: 8.8% of 64079 checklistsMay 15-21: 8.3% of 52020 checklistsMay 22-31: 8.1% of 55402 checklistsJun 1-7: 8.0% of 30682 checklistsJun 8-14: 7.8% of 27557 checklistsJun 15-21: 7.7% of 26163 checklistsJun 22-30: 7.4% of 29576 checklistsJul 1-7: 7.2% of 23931 checklistsJul 8-14: 6.4% of 22389 checklistsJul 15-21: 6.5% of 22365 checklistsJul 22-31: 6.4% of 32631 checklistsAug 1-7: 6.3% of 25133 checklistsAug 8-14: 6.3% of 24610 checklistsAug 15-21: 6.4% of 25350 checklistsAug 22-31: 7.0% of 37198 checklistsSep 1-7: 7.2% of 27402 checklistsSep 8-14: 7.5% of 27700 checklistsSep 15-21: 8.2% of 28398 checklistsSep 22-30: 8.3% of 34646 checklistsOct 1-7: 8.9% of 28620 checklistsOct 8-14: 10% of 30144 checklistsOct 15-21: 11% of 28893 checklistsOct 22-31: 11% of 38869 checklistsNov 1-7: 13% of 29782 checklistsNov 8-14: 13% of 27582 checklistsNov 15-21: 13% of 26642 checklistsNov 22-30: 13% of 34390 checklistsDec 1-7: 12% of 25164 checklistsDec 8-14: 11% of 24892 checklistsDec 15-21: 9.9% of 29022 checklistsDec 22-31: 10% of 44323 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 Massachusetts 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 Massachusetts

Best counties

Share of checklists at the peak
  1. Hampden CountyBest the second week of March · 763 checklists that week, 35,410 in all27%
  2. Nantucket CountyBest the second week of April · 425 checklists that week, 23,895 in all23%
  3. Middlesex CountyBest the second week of March · 6879 checklists that week, 307,511 in all23%
  4. Plymouth CountyBest late March · 2692 checklists that week, 89,282 in all23%
  5. Bristol CountyBest the second week of November · 1197 checklists that week, 65,262 in all20%
  6. Franklin CountyBest early February · 680 checklists that week, 41,382 in all20%

Best spots

Share of checklists at the peak
  1. Herring Pond Town LandingBarnstable County, best the second week of October · 24 checklists that week, 1,252 in all100%
  2. Barton IslandFranklin County, best early October · 20 checklists that week, 1,218 in all99%
  3. Hager PondMiddlesex County, best late January · 23 checklists that week, 415 in all98%
  4. Hummock PondNantucket County, best the second week of October · 21 checklists that week, 528 in all98%
  5. Mill Pond (Little Sandy Pond)Barnstable County, best late March · 26 checklists that week, 609 in all98%
  6. Atwood Reservoir Wildlife Management AreaPlymouth County, best late April · 61 checklists that week, 454 in all98%

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

Best time of day

In Massachusetts, the Mute Swan is most often listed on checklists started between 2 and 4 pm (11% of those checklists).

0%5%10%15%12 am: too few checklists (630) to judge1 am: too few checklists (657) to judge2 am: too few checklists (645) to judge3 am: too few checklists (850) to judge4 am: too few checklists (3787) to judge5 am: too few checklists (29743) to judge6 am: 9.4% of 108601 checklists7 am: 9.1% of 186104 checklists8 am: 10% of 185905 checklists9 am: 10% of 166049 checklists10 am: 10% of 150508 checklists11 am: 10% of 131024 checklists12 pm: 10% of 116804 checklists1 pm: 11% of 112055 checklists2 pm: 11% of 110246 checklists3 pm: 11% of 104376 checklists4 pm: 10% of 83736 checklists5 pm: 8.8% of 63723 checklists6 pm: 7.6% of 41435 checklists7 pm: too few checklists (21041) to judge8 pm: too few checklists (5240) to judge9 pm: too few checklists (1722) to judge10 pm: too few checklists (1094) to judge11 pm: too few checklists (704) 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
January11%11%10%10%
February11%10%9.6%13%
March13%14%14%13%
April13%12%11%11%
May9.5%8.8%8.3%8.1%
June8.0%7.8%7.7%7.4%
July7.2%6.4%6.5%6.4%
August6.3%6.3%6.4%7.0%
September7.2%7.5%8.2%8.3%
October8.9%10%11%11%
November13%13%13%13%
December12%11%9.9%10%

Neighboring states

Common questions

When do Mute Swans arrive in Massachusetts?
The Mute Swan is in Massachusetts all year. It turns up on about 13% of checklists at its peak (mid March) and on 6.3% in its quietest week (the second week of August).
When do Mute Swans leave Massachusetts?
The Mute Swan does not leave Massachusetts: it is reported all year, from 6.3% of checklists in the second week of August to 13% in mid March.
When is the best time to see a Mute Swan in Massachusetts?
The Mute Swan is reported most often in mid March, on about 13% of Massachusetts checklists.
Where in Massachusetts are Mute Swans seen most often?
By county, Hampden County, Nantucket County, and Middlesex County have the highest peak reporting rates for the Mute Swan (counties with at least 200 checklists).