WhenToBird

Setophaga palmarum · Parulidae

When Do Palm Warblers Arrive in Massachusetts?

Adult Palm Warbler
Photo: Sean Frey, CC BY 4.0 via iNaturalist

Palm Warblers arrive in Massachusetts in late March, peak in mid April (15% of checklists), and most are gone by mid May.

When to look

First arrivalsMar 22-31late March
Common byMar 22-31late March
PeakApr 15-21mid April
Most gone byMay 15-21mid May

Best: mid April. First arrivals late March; most are gone by mid May. Peak: on about 15% of Massachusetts checklists.

  1. Jannot usually seen
  2. Febnot usually seen
  3. Marrare
  4. Aprpeak season
  5. Maycommon
  6. Junnot usually seen
  7. Julnot usually seen
  8. Augnot usually seen
  9. Sepcommon
  10. Octpeak season
  11. Novuncommon
  12. Decnot usually seen

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

0%5%10%15%20%Jan 1-7: 0.3% of 43252 checklistsJan 8-14: 0.2% of 30096 checklistsJan 15-21: 0.1% of 28760 checklistsJan 22-31: 0.1% of 38135 checklistsFeb 1-7: 0.1% of 26442 checklistsFeb 8-14: 0.1% of 29034 checklistsFeb 15-21: 0.1% of 37383 checklistsFeb 22-28: 0.1% of 29977 checklistsMar 1-7: 0.1% of 29175 checklistsMar 8-14: 0.1% of 32399 checklistsMar 15-21: 0.1% of 34444 checklistsMar 22-31: 0.1% of 49126 checklistsApr 1-7: 2.1% of 36456 checklistsApr 8-14: 11% of 40908 checklistsApr 15-21: 17% of 42078 checklistsApr 22-30: 16% of 56465 checklistsMay 1-7: 9.9% of 56994 checklistsMay 8-14: 2.8% of 64079 checklistsMay 15-21: 0.1% of 52020 checklistsMay 22-31: 0.1% of 55402 checklistsJun 1-7: 0% of 30682 checklistsJun 8-14: 0% of 27557 checklistsJun 15-21: 0% of 26163 checklistsJun 22-30: 0% of 29576 checklistsJul 1-7: 0% of 23931 checklistsJul 8-14: 0% of 22389 checklistsJul 15-21: 0.1% of 22365 checklistsJul 22-31: 0% of 32631 checklistsAug 1-7: 0% of 25133 checklistsAug 8-14: 0% of 24610 checklistsAug 15-21: 0% of 25350 checklistsAug 22-31: 0.1% of 37198 checklistsSep 1-7: 0.3% of 27402 checklistsSep 8-14: 2.2% of 27700 checklistsSep 15-21: 5.4% of 28398 checklistsSep 22-30: 9.4% of 34646 checklistsOct 1-7: 13% of 28620 checklistsOct 8-14: 12% of 30144 checklistsOct 15-21: 10% of 28893 checklistsOct 22-31: 6.2% of 38869 checklistsNov 1-7: 2.3% of 29782 checklistsNov 8-14: 1.5% of 27582 checklistsNov 15-21: 0.9% of 26642 checklistsNov 22-30: 0.7% of 34390 checklistsDec 1-7: 0.4% of 25164 checklistsDec 8-14: 0.3% of 24892 checklistsDec 15-21: 0.4% of 29022 checklistsDec 22-31: 0.3% 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 mid April · 1026 checklists that week, 35,410 in all28%
  2. Middlesex CountyBest mid April · 8408 checklists that week, 307,511 in all21%
  3. Franklin CountyBest the second week of October · 845 checklists that week, 41,382 in all18%
  4. Worcester CountyBest early October · 2185 checklists that week, 128,594 in all18%
  5. Hampshire CountyBest mid April · 4381 checklists that week, 162,423 in all18%
  6. Berkshire CountyBest early October · 1708 checklists that week, 92,890 in all18%

Best spots

Share of checklists at the peak
  1. Chandler PondSuffolk County, best mid April · 86 checklists that week, 1,769 in all82%
  2. Flax PondBarnstable County, best late October · 35 checklists that week, 668 in all75%
  3. Paine's Creek BeachBarnstable County, best late October · 119 checklists that week, 252 in all75%
  4. Fannie Stebbins Memorial Wildlife RefugeHampden County, best mid April · 102 checklists that week, 4,030 in all71%
  5. Wade PondHampden County, best mid April · 44 checklists that week, 516 in all70%

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

Best time of day

In Massachusetts, the Palm Warbler is most often listed on checklists started between 6 and 8 am (4.8% of those checklists).

0%2%4%6%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: 5.1% of 108601 checklists7 am: 4.6% of 186104 checklists8 am: 3.8% of 185905 checklists9 am: 3.2% of 166049 checklists10 am: 2.7% of 150508 checklists11 am: 2.3% of 131024 checklists12 pm: 2.2% of 116804 checklists1 pm: 2.2% of 112055 checklists2 pm: 2.3% of 110246 checklists3 pm: 2.2% of 104376 checklists4 pm: 2.8% of 83736 checklists5 pm: 2.5% of 63723 checklists6 pm: 1.5% 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
January0.3%0.2%0.1%0.1%
February0.1%0.1%0.1%0.1%
March0.1%0.1%0.1%0.1%
April2.1%11%17%16%
May9.9%2.8%0.1%0.1%
June0%0%0%0%
July0%0%0.1%0%
August0%0%0%0.1%
September0.3%2.2%5.4%9.4%
October13%12%10%6.2%
November2.3%1.5%0.9%0.7%
December0.4%0.3%0.4%0.3%

Neighboring states

  • Rhode Island: arrives early September, 21 weeks later than Massachusetts
  • New Hampshire: arrives early September, 21 weeks later than Massachusetts
  • Connecticut: arrives early September, 21 weeks later than Massachusetts
  • Vermont: arrives late August, 20 weeks later than Massachusetts

Common questions

When do Palm Warblers arrive in Massachusetts?
Palm Warblers arrive in Massachusetts in late March, peak in mid April (15% of checklists), and most are gone by mid May.
When do Palm Warblers leave Massachusetts?
Most Palm Warblers have left Massachusetts by mid May, when reports fall below half their usual rate.
When is the best time to see a Palm Warbler in Massachusetts?
The Palm Warbler is reported most often in mid April, on about 15% of Massachusetts checklists.
Where in Massachusetts are Palm Warblers seen most often?
By county, Hampden County, Middlesex County, and Franklin County have the highest peak reporting rates for the Palm Warbler (counties with at least 200 checklists).