WhenToBird

Buteo lineatus · Accipitridae

When Do Red-shouldered Hawks Arrive in Massachusetts?

Adult Red-shouldered Hawk
Photo: Jonathan Eisen, CC BY 4.0 via iNaturalist

Red-shouldered Hawks reach Massachusetts in late January, are common by early February, peak in mid September (4.4% of checklists), and most are gone by late November.

When to look

First arrivalsJan 22-31late January
Common byFeb 1-7early February
PeakSep 15-21mid September
Most gone byNov 22-30late November

Best: mid September. First arrivals late January; most are gone by late November. Peak: on about 4.4% of Massachusetts checklists.

  1. Januncommon
  2. Febuncommon
  3. Marcommon
  4. Aprcommon
  5. Maycommon
  6. Juncommon
  7. Julcommon
  8. Augcommon
  9. Seppeak season
  10. Octpeak season
  11. Novcommon
  12. Decuncommon

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

0%2%4%6%Jan 1-7: 0.8% of 43252 checklistsJan 8-14: 0.9% of 30096 checklistsJan 15-21: 0.9% of 28760 checklistsJan 22-31: 1.0% of 38135 checklistsFeb 1-7: 1.1% of 26442 checklistsFeb 8-14: 1.4% of 29034 checklistsFeb 15-21: 1.2% of 37383 checklistsFeb 22-28: 1.8% of 29977 checklistsMar 1-7: 2.0% of 29175 checklistsMar 8-14: 2.6% of 32399 checklistsMar 15-21: 3.1% of 34444 checklistsMar 22-31: 2.7% of 49126 checklistsApr 1-7: 2.6% of 36456 checklistsApr 8-14: 2.9% of 40908 checklistsApr 15-21: 2.9% of 42078 checklistsApr 22-30: 2.8% of 56465 checklistsMay 1-7: 2.6% of 56994 checklistsMay 8-14: 2.1% of 64079 checklistsMay 15-21: 2.0% of 52020 checklistsMay 22-31: 2.3% of 55402 checklistsJun 1-7: 2.1% of 30682 checklistsJun 8-14: 2.3% of 27557 checklistsJun 15-21: 2.0% of 26163 checklistsJun 22-30: 1.6% of 29576 checklistsJul 1-7: 1.5% of 23931 checklistsJul 8-14: 1.5% of 22389 checklistsJul 15-21: 1.6% of 22365 checklistsJul 22-31: 1.9% of 32631 checklistsAug 1-7: 1.9% of 25133 checklistsAug 8-14: 2.2% of 24610 checklistsAug 15-21: 2.5% of 25350 checklistsAug 22-31: 2.8% of 37198 checklistsSep 1-7: 3.3% of 27402 checklistsSep 8-14: 4.2% of 27700 checklistsSep 15-21: 4.7% of 28398 checklistsSep 22-30: 4.4% of 34646 checklistsOct 1-7: 3.7% of 28620 checklistsOct 8-14: 3.2% of 30144 checklistsOct 15-21: 2.6% of 28893 checklistsOct 22-31: 2.1% of 38869 checklistsNov 1-7: 1.8% of 29782 checklistsNov 8-14: 1.5% of 27582 checklistsNov 15-21: 1.3% of 26642 checklistsNov 22-30: 1.1% of 34390 checklistsDec 1-7: 1.0% of 25164 checklistsDec 8-14: 1.1% of 24892 checklistsDec 15-21: 1.1% of 29022 checklistsDec 22-31: 0.9% 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 September · 670 checklists that week, 35,410 in all11%
  2. Bristol CountyBest late September · 1256 checklists that week, 65,262 in all10%
  3. Worcester CountyBest mid September · 2153 checklists that week, 128,594 in all8.8%
  4. Plymouth CountyBest early October · 1392 checklists that week, 89,282 in all8.2%
  5. Franklin CountyBest mid September · 668 checklists that week, 41,382 in all7.1%
  6. Norfolk CountyBest mid September · 2135 checklists that week, 114,756 in all6.2%

Best spots

Share of checklists at the peak
  1. Brooks BrookMiddlesex County, best early April · 53 checklists that week, 1,589 in all65%
  2. Forge PondPlymouth County, best late September · 22 checklists that week, 366 in all61%
  3. Poppasguash SwampBristol County, best mid April · 50 checklists that week, 2,031 in all38%
  4. Wachusett Mountain State ReservationWorcester County, best early November · 22 checklists that week, 718 in all38%
  5. Santuit PondBarnstable County, best mid September · 94 checklists that week, 2,736 in all35%

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

Best time of day

In Massachusetts, the Red-shouldered Hawk is most often listed on checklists started between 6 and 8 am (2.8% of those checklists).

0%1%2%3%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: 2.9% of 108601 checklists7 am: 2.7% of 186104 checklists8 am: 2.7% of 185905 checklists9 am: 2.8% of 166049 checklists10 am: 2.6% of 150508 checklists11 am: 2.3% of 131024 checklists12 pm: 2.0% of 116804 checklists1 pm: 1.7% of 112055 checklists2 pm: 1.5% of 110246 checklists3 pm: 1.3% of 104376 checklists4 pm: 1.2% of 83736 checklists5 pm: 0.9% of 63723 checklists6 pm: 0.6% 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
January0.8%0.9%0.9%1.0%
February1.1%1.4%1.2%1.8%
March2.0%2.6%3.1%2.7%
April2.6%2.9%2.9%2.8%
May2.6%2.1%2.0%2.3%
June2.1%2.3%2.0%1.6%
July1.5%1.5%1.6%1.9%
August1.9%2.2%2.5%2.8%
September3.3%4.2%4.7%4.4%
October3.7%3.2%2.6%2.1%
November1.8%1.5%1.3%1.1%
December1.0%1.1%1.1%0.9%

Neighboring states

  • Rhode Island: arrives early August, 23 weeks earlier than Massachusetts
  • New Hampshire: arrives early March, 5 weeks later than Massachusetts
  • Connecticut: arrives early September, 19 weeks earlier than Massachusetts
  • Vermont: arrives the second week of March, 6 weeks later than Massachusetts

Common questions

When do Red-shouldered Hawks arrive in Massachusetts?
Red-shouldered Hawks reach Massachusetts in late January, are common by early February, peak in mid September (4.4% of checklists), and most are gone by late November.
When do Red-shouldered Hawks leave Massachusetts?
Most Red-shouldered Hawks have left Massachusetts by late November, when reports fall below half their usual rate. Stragglers are still reported until mid December.
When is the best time to see a Red-shouldered Hawk in Massachusetts?
The Red-shouldered Hawk is reported most often in mid September, on about 4.4% of Massachusetts checklists.
Where in Massachusetts are Red-shouldered Hawks seen most often?
By county, Hampden County, Bristol County, and Worcester County have the highest peak reporting rates for the Red-shouldered Hawk (counties with at least 200 checklists).