WhenToBird

Euphagus carolinus · Icteridae

When Do Rusty Blackbirds Arrive in Massachusetts?

Adult female Rusty Blackbird
Photo: Carol Ann Vermeer, CC BY 4.0 via iNaturalist

Rusty Blackbirds are winter birds in Massachusetts: they arrive in late September, peak in mid October (2.4% of checklists), and most are gone by early December.

When to look

First arrivalsSep 22-30late September
Common bySep 22-30late September
PeakOct 15-21mid October
Most gone byDec 1-7early December

Best: mid October. First arrivals late September; most are gone by early December. Peak: on about 2.4% of Massachusetts checklists.

  1. Janrare
  2. Febuncommon
  3. Marcommon
  4. Aprpeak season
  5. Mayuncommon
  6. Junnot usually seen
  7. Julnot usually seen
  8. Augnot usually seen
  9. Sepuncommon
  10. Octpeak season
  11. Novpeak season
  12. Decuncommon

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

0%1%2%3%Jan 1-7: 0.2% of 43252 checklistsJan 8-14: 0.2% of 30096 checklistsJan 15-21: 0.2% of 28760 checklistsJan 22-31: 0.3% of 38135 checklistsFeb 1-7: 0.3% of 26442 checklistsFeb 8-14: 0.2% of 29034 checklistsFeb 15-21: 0.3% of 37383 checklistsFeb 22-28: 0.4% of 29977 checklistsMar 1-7: 0.6% of 29175 checklistsMar 8-14: 0.8% of 32399 checklistsMar 15-21: 1.3% of 34444 checklistsMar 22-31: 1.7% of 49126 checklistsApr 1-7: 2.2% of 36456 checklistsApr 8-14: 2.7% of 40908 checklistsApr 15-21: 2.4% of 42078 checklistsApr 22-30: 1.9% of 56465 checklistsMay 1-7: 0.8% of 56994 checklistsMay 8-14: 0.2% of 64079 checklistsMay 15-21: 0.1% of 52020 checklistsMay 22-31: 0.1% of 55402 checklistsJun 1-7: 0.1% 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% 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% of 37198 checklistsSep 1-7: 0% of 27402 checklistsSep 8-14: 0.1% of 27700 checklistsSep 15-21: 0.1% of 28398 checklistsSep 22-30: 0.5% of 34646 checklistsOct 1-7: 1.3% of 28620 checklistsOct 8-14: 2.3% of 30144 checklistsOct 15-21: 2.7% of 28893 checklistsOct 22-31: 2.4% of 38869 checklistsNov 1-7: 1.8% of 29782 checklistsNov 8-14: 1.3% of 27582 checklistsNov 15-21: 0.9% of 26642 checklistsNov 22-30: 0.6% of 34390 checklistsDec 1-7: 0.4% of 25164 checklistsDec 8-14: 0.4% of 24892 checklistsDec 15-21: 0.3% of 29022 checklistsDec 22-31: 0.4% 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 late October · 891 checklists that week, 35,410 in all8.1%
  2. Middlesex CountyBest mid October · 5614 checklists that week, 307,511 in all4.7%
  3. Worcester CountyBest mid October · 2259 checklists that week, 128,594 in all4.2%
  4. Hampshire CountyBest the second week of April · 4013 checklists that week, 162,423 in all3.5%
  5. Berkshire CountyBest mid April · 2632 checklists that week, 92,890 in all3.4%
  6. Franklin CountyBest mid October · 742 checklists that week, 41,382 in all3.0%

Best spots

Share of checklists at the peak
  1. Reedy Meadow Golf CourseEssex County, best mid April · 38 checklists that week, 660 in all58%
  2. Beaver Dam Brook ReservationEssex County, best late March · 29 checklists that week, 342 in all56%
  3. Beck PondEssex County, best mid April · 25 checklists that week, 653 in all53%
  4. Lexington ReservoirMiddlesex County, best mid April · 26 checklists that week, 239 in all52%
  5. Lower Delaney PondMiddlesex County, best mid October · 35 checklists that week, 1,117 in all49%
  6. Post FarmBerkshire County, best early April · 28 checklists that week, 733 in all46%

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

Best time of day

In Massachusetts, the Rusty Blackbird is most often listed on checklists started between 6 and 8 am (1.1% 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: 1.1% of 186104 checklists8 am: 0.9% of 185905 checklists9 am: 0.7% of 166049 checklists10 am: 0.6% of 150508 checklists11 am: 0.5% of 131024 checklists12 pm: 0.5% of 116804 checklists1 pm: 0.5% of 112055 checklists2 pm: 0.5% of 110246 checklists3 pm: 0.5% of 104376 checklists4 pm: 0.7% of 83736 checklists5 pm: 0.8% of 63723 checklists6 pm: 0.8% 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
January0.2%0.2%0.2%0.3%
February0.3%0.2%0.3%0.4%
March0.6%0.8%1.3%1.7%
April2.2%2.7%2.4%1.9%
May0.8%0.2%0.1%0.1%
June0.1%0%0%0%
July0%0%0%0%
August0%0%0%0%
September0%0.1%0.1%0.5%
October1.3%2.3%2.7%2.4%
November1.8%1.3%0.9%0.6%
December0.4%0.4%0.3%0.4%

Neighboring states

  • Rhode Island: arrives early October, 1 week later than Massachusetts
  • New Hampshire: arrives mid September, 1 week earlier than Massachusetts
  • Connecticut: arrives early October, 1 week later than Massachusetts
  • Vermont: arrives mid September, 1 week earlier than Massachusetts

Common questions

When do Rusty Blackbirds arrive in Massachusetts?
Rusty Blackbirds are winter birds in Massachusetts: they arrive in late September, peak in mid October (2.4% of checklists), and most are gone by early December.
When do Rusty Blackbirds leave Massachusetts?
Most Rusty Blackbirds have left Massachusetts by early December, when reports fall below half their usual rate.
When is the best time to see a Rusty Blackbird in Massachusetts?
The Rusty Blackbird is reported most often in mid October, on about 2.4% of Massachusetts checklists.
Where in Massachusetts are Rusty Blackbirds seen most often?
By county, Hampden County, Middlesex County, and Worcester County have the highest peak reporting rates for the Rusty Blackbird (counties with at least 200 checklists).