WhenToBird

Parkesia motacilla · Parulidae

When Do Louisiana Waterthrushes Arrive in Massachusetts?

Adult Louisiana Waterthrush
Photo: Brian White, CC BY 4.0 via iNaturalist

Louisiana Waterthrushes arrive in Massachusetts in the second week of April, peak in late April (2.4% of checklists), and most are gone by late June.

When to look

First arrivalsApr 8-14the second week of April
Common byApr 8-14the second week of April
PeakApr 22-30late April
Most gone byJun 22-30late June

Best: late April. First arrivals the second week of April; most are gone by late June. Peak: on about 2.4% of Massachusetts checklists.

  1. Jannot usually seen
  2. Febnot usually seen
  3. Marnot usually seen
  4. Aprpeak season
  5. Maypeak season
  6. Juncommon
  7. Juluncommon
  8. Auguncommon
  9. Sepnot usually seen
  10. Octnot usually seen
  11. Novnot usually seen
  12. Decnot usually seen

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

0%1%2%3%Jan 1-7: 0% of 43252 checklistsJan 8-14: 0% of 30096 checklistsJan 15-21: 0% of 28760 checklistsJan 22-31: 0% of 38135 checklistsFeb 1-7: 0% of 26442 checklistsFeb 8-14: 0% of 29034 checklistsFeb 15-21: 0% of 37383 checklistsFeb 22-28: 0% of 29977 checklistsMar 1-7: 0% of 29175 checklistsMar 8-14: 0% of 32399 checklistsMar 15-21: 0% of 34444 checklistsMar 22-31: 0.1% of 49126 checklistsApr 1-7: 0.1% of 36456 checklistsApr 8-14: 1.4% of 40908 checklistsApr 15-21: 2.3% of 42078 checklistsApr 22-30: 2.6% of 56465 checklistsMay 1-7: 2.4% of 56994 checklistsMay 8-14: 1.8% of 64079 checklistsMay 15-21: 1.6% of 52020 checklistsMay 22-31: 1.4% of 55402 checklistsJun 1-7: 1.3% of 30682 checklistsJun 8-14: 1.1% of 27557 checklistsJun 15-21: 0.9% of 26163 checklistsJun 22-30: 0.7% of 29576 checklistsJul 1-7: 0.6% of 23931 checklistsJul 8-14: 0.4% of 22389 checklistsJul 15-21: 0.4% of 22365 checklistsJul 22-31: 0.5% of 32631 checklistsAug 1-7: 0.4% of 25133 checklistsAug 8-14: 0.3% of 24610 checklistsAug 15-21: 0.1% of 25350 checklistsAug 22-31: 0.1% of 37198 checklistsSep 1-7: 0.1% of 27402 checklistsSep 8-14: 0% of 27700 checklistsSep 15-21: 0% of 28398 checklistsSep 22-30: 0% of 34646 checklistsOct 1-7: 0% of 28620 checklistsOct 8-14: 0% of 30144 checklistsOct 15-21: 0% of 28893 checklistsOct 22-31: 0% of 38869 checklistsNov 1-7: 0% of 29782 checklistsNov 8-14: 0% of 27582 checklistsNov 15-21: 0% of 26642 checklistsNov 22-30: 0% of 34390 checklistsDec 1-7: 0% of 25164 checklistsDec 8-14: 0% of 24892 checklistsDec 15-21: 0% of 29022 checklistsDec 22-31: 0% 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. Franklin CountyBest early May · 1762 checklists that week, 41,382 in all10%
  2. Hampshire CountyBest early May · 6139 checklists that week, 162,423 in all8.4%
  3. Hampden CountyBest early May · 1213 checklists that week, 35,410 in all7.0%
  4. Worcester CountyBest late April · 4614 checklists that week, 128,594 in all3.8%
  5. Berkshire CountyBest the second week of May · 3901 checklists that week, 92,890 in all3.5%
  6. Essex CountyBest mid April · 5606 checklists that week, 213,973 in all2.6%

Best spots

Share of checklists at the peak
  1. J. C. Phillips SanctuaryEssex County, best mid April · 229 checklists that week, 1,160 in all64%
  2. Connecticut River Greenway State ParkHampshire County, best late April · 141 checklists that week, 1,783 in all57%
  3. Lily Pond (Deep Hole)Franklin County, best the second week of May · 21 checklists that week, 661 in all47%
  4. Cranberry PondFranklin County, best early May · 20 checklists that week, 209 in all44%
  5. PackardvilleHampshire County, best mid May · 21 checklists that week, 459 in all39%

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

Best time of day

In Massachusetts, the Louisiana Waterthrush is most often listed on checklists started between 6 and 8 am (1.0% of those checklists).

0%0.5%1%1.5%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: 1.2% of 108601 checklists7 am: 0.8% of 186104 checklists8 am: 0.6% of 185905 checklists9 am: 0.5% of 166049 checklists10 am: 0.5% of 150508 checklists11 am: 0.4% of 131024 checklists12 pm: 0.3% of 116804 checklists1 pm: 0.2% of 112055 checklists2 pm: 0.2% of 110246 checklists3 pm: 0.3% of 104376 checklists4 pm: 0.2% of 83736 checklists5 pm: 0.3% of 63723 checklists6 pm: 0.4% 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%0%0%0%
February0%0%0%0%
March0%0%0%0.1%
April0.1%1.4%2.3%2.6%
May2.4%1.8%1.6%1.4%
June1.3%1.1%0.9%0.7%
July0.6%0.4%0.4%0.5%
August0.4%0.3%0.1%0.1%
September0.1%0%0%0%
October0%0%0%0%
November0%0%0%0%
December0%0%0%0%

Neighboring states

  • Rhode Island: arrives early April, 1 week earlier than Massachusetts
  • New Hampshire: arrives the second week of April, in the same week than Massachusetts
  • Connecticut: arrives early April, 1 week earlier than Massachusetts
  • Vermont: arrives the second week of April, in the same week than Massachusetts

Common questions

When do Louisiana Waterthrushes arrive in Massachusetts?
Louisiana Waterthrushes arrive in Massachusetts in the second week of April, peak in late April (2.4% of checklists), and most are gone by late June.
When do Louisiana Waterthrushes leave Massachusetts?
Most Louisiana Waterthrushes have left Massachusetts by late June, when reports fall below half their usual rate.
When is the best time to see a Louisiana Waterthrush in Massachusetts?
The Louisiana Waterthrush is reported most often in late April, on about 2.4% of Massachusetts checklists.
Where in Massachusetts are Louisiana Waterthrushes seen most often?
By county, Franklin County, Hampshire County, and Hampden County have the highest peak reporting rates for the Louisiana Waterthrush (counties with at least 200 checklists).