WhenToBird

Sialia sialis · Turdidae

When Do Eastern Bluebirds Arrive in Massachusetts?

Adult male Eastern Bluebird
Photo: Dan Vickers, CC BY 4.0 via iNaturalist

The Eastern Bluebird is in Massachusetts all year. It turns up on about 14% of checklists at its peak (mid March) and on 7.4% in its quietest week (mid August).

When to look

PresentAll year
Peak weekMar 15-21mid March
Quietest weekAug 15-21mid August

Best: mid March. Here all year. Peak: on about 14% of Massachusetts checklists.

  1. Jancommon
  2. Febpeak season
  3. Marpeak season
  4. Aprpeak season
  5. Maypeak season
  6. Junpeak season
  7. Julcommon
  8. Augcommon
  9. Sepcommon
  10. Octpeak season
  11. Novpeak season
  12. Deccommon

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

0%5%10%15%Jan 1-7: 8.4% of 43252 checklistsJan 8-14: 8.0% of 30096 checklistsJan 15-21: 8.1% of 28760 checklistsJan 22-31: 8.4% of 38135 checklistsFeb 1-7: 9.2% of 26442 checklistsFeb 8-14: 11% of 29034 checklistsFeb 15-21: 12% 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: 14% of 49126 checklistsApr 1-7: 14% of 36456 checklistsApr 8-14: 14% of 40908 checklistsApr 15-21: 14% of 42078 checklistsApr 22-30: 14% of 56465 checklistsMay 1-7: 13% of 56994 checklistsMay 8-14: 12% of 64079 checklistsMay 15-21: 11% of 52020 checklistsMay 22-31: 11% of 55402 checklistsJun 1-7: 11% of 30682 checklistsJun 8-14: 11% of 27557 checklistsJun 15-21: 11% of 26163 checklistsJun 22-30: 10% of 29576 checklistsJul 1-7: 11% of 23931 checklistsJul 8-14: 9.8% of 22389 checklistsJul 15-21: 8.8% of 22365 checklistsJul 22-31: 7.8% of 32631 checklistsAug 1-7: 7.7% of 25133 checklistsAug 8-14: 7.4% of 24610 checklistsAug 15-21: 7.0% of 25350 checklistsAug 22-31: 7.6% of 37198 checklistsSep 1-7: 7.5% of 27402 checklistsSep 8-14: 7.7% of 27700 checklistsSep 15-21: 8.3% of 28398 checklistsSep 22-30: 10% of 34646 checklistsOct 1-7: 12% of 28620 checklistsOct 8-14: 12% of 30144 checklistsOct 15-21: 13% of 28893 checklistsOct 22-31: 14% of 38869 checklistsNov 1-7: 14% of 29782 checklistsNov 8-14: 13% of 27582 checklistsNov 15-21: 11% of 26642 checklistsNov 22-30: 10% of 34390 checklistsDec 1-7: 8.8% of 25164 checklistsDec 8-14: 9.3% of 24892 checklistsDec 15-21: 10% of 29022 checklistsDec 22-31: 9.6% 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. Worcester CountyBest mid March · 3073 checklists that week, 128,594 in all26%
  2. Franklin CountyBest late October · 977 checklists that week, 41,382 in all25%
  3. Hampshire CountyBest late October · 4201 checklists that week, 162,423 in all20%
  4. Berkshire CountyBest early March · 1541 checklists that week, 92,890 in all20%
  5. Hampden CountyBest mid April · 1026 checklists that week, 35,410 in all18%
  6. Middlesex CountyBest late October · 7374 checklists that week, 307,511 in all15%

Best spots

Share of checklists at the peak
  1. Southwick Wildlife Management AreaHampden County, best early April · 22 checklists that week, 853 in all92%
  2. Farm PondMiddlesex County, best late October · 20 checklists that week, 758 in all91%
  3. Cow CommonMiddlesex County, best late March · 24 checklists that week, 667 in all86%
  4. Millers River Wildlife Management AreaWorcester County, best the second week of May · 26 checklists that week, 486 in all86%
  5. Storage TanksMiddlesex County, best late April · 36 checklists that week, 969 in all86%

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

Best time of day

In Massachusetts, the Eastern Bluebird is most often listed on checklists started between 6 and 8 am (15% of those checklists).

0%5%10%15%20%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: 15% of 108601 checklists7 am: 15% of 186104 checklists8 am: 14% of 185905 checklists9 am: 13% of 166049 checklists10 am: 11% of 150508 checklists11 am: 9.2% of 131024 checklists12 pm: 8.4% of 116804 checklists1 pm: 8.9% of 112055 checklists2 pm: 8.6% of 110246 checklists3 pm: 8.1% of 104376 checklists4 pm: 8.6% of 83736 checklists5 pm: 9.0% of 63723 checklists6 pm: 7.9% 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
January8.4%8.0%8.1%8.4%
February9.2%11%12%13%
March13%14%14%14%
April14%14%14%14%
May13%12%11%11%
June11%11%11%10%
July11%9.8%8.8%7.8%
August7.7%7.4%7.0%7.6%
September7.5%7.7%8.3%10%
October12%12%13%14%
November14%13%11%10%
December8.8%9.3%10%9.6%

Neighboring states

Common questions

When do Eastern Bluebirds arrive in Massachusetts?
The Eastern Bluebird is in Massachusetts all year. It turns up on about 14% of checklists at its peak (mid March) and on 7.4% in its quietest week (mid August).
When do Eastern Bluebirds leave Massachusetts?
The Eastern Bluebird does not leave Massachusetts: it is reported all year, from 7.4% of checklists in mid August to 14% in mid March.
When is the best time to see a Eastern Bluebird in Massachusetts?
The Eastern Bluebird is reported most often in mid March, on about 14% of Massachusetts checklists.
Where in Massachusetts are Eastern Bluebirds seen most often?
By county, Worcester County, Franklin County, and Hampshire County have the highest peak reporting rates for the Eastern Bluebird (counties with at least 200 checklists).