WhenToBird

Agelaius phoeniceus · Icteridae

When Do Red-winged Blackbirds Arrive in Connecticut?

Adult male Red-winged Blackbird
Photo: infiniteuniverse, CC0 1.0 via iNaturalist

Red-winged Blackbirds are in Connecticut all year, but most are here in spring: numbers build from early March, peak in late April (58% of checklists), and fall back by mid July. In the quietest week (early January) they are still on about 3.5% of checklists.

When to look

Numbers buildMar 1-7early March
PeakApr 22-30late April
Fall back byJul 15-21mid July
FewestJan 1-7early January

Best: late April. Here all year; numbers build from early March and fall back by mid July. Peak: on about 58% of Connecticut checklists.

  1. Janrare
  2. Febuncommon
  3. Marpeak season
  4. Aprpeak season
  5. Maypeak season
  6. Junpeak season
  7. Julcommon
  8. Augcommon
  9. Seprare
  10. Octuncommon
  11. Novuncommon
  12. Decrare

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

0%20%40%60%Jan 1-7: 3.5% of 18950 checklistsJan 8-14: 4.0% of 13676 checklistsJan 15-21: 4.9% of 13377 checklistsJan 22-31: 4.3% of 17004 checklistsFeb 1-7: 4.5% of 10218 checklistsFeb 8-14: 7.2% of 11568 checklistsFeb 15-21: 14% of 15916 checklistsFeb 22-28: 25% of 11413 checklistsMar 1-7: 34% of 10754 checklistsMar 8-14: 39% of 12051 checklistsMar 15-21: 41% of 12616 checklistsMar 22-31: 44% of 17801 checklistsApr 1-7: 47% of 13186 checklistsApr 8-14: 52% of 14428 checklistsApr 15-21: 56% of 14738 checklistsApr 22-30: 59% of 21753 checklistsMay 1-7: 59% of 22494 checklistsMay 8-14: 57% of 23363 checklistsMay 15-21: 55% of 20219 checklistsMay 22-31: 54% of 20778 checklistsJun 1-7: 51% of 12234 checklistsJun 8-14: 50% of 12491 checklistsJun 15-21: 47% of 10856 checklistsJun 22-30: 43% of 11964 checklistsJul 1-7: 43% of 9437 checklistsJul 8-14: 42% of 8599 checklistsJul 15-21: 38% of 8252 checklistsJul 22-31: 32% of 11329 checklistsAug 1-7: 23% of 8116 checklistsAug 8-14: 16% of 8051 checklistsAug 15-21: 11% of 8502 checklistsAug 22-31: 8.9% of 13673 checklistsSep 1-7: 7.2% of 9873 checklistsSep 8-14: 5.6% of 9735 checklistsSep 15-21: 5.0% of 10120 checklistsSep 22-30: 6.0% of 12543 checklistsOct 1-7: 8.4% of 10735 checklistsOct 8-14: 11% of 10869 checklistsOct 15-21: 14% of 10436 checklistsOct 22-31: 14% of 13808 checklistsNov 1-7: 14% of 10507 checklistsNov 8-14: 12% of 9827 checklistsNov 15-21: 10% of 9904 checklistsNov 22-30: 7.0% of 13396 checklistsDec 1-7: 5.2% of 8974 checklistsDec 8-14: 4.6% of 9468 checklistsDec 15-21: 4.8% of 11614 checklistsDec 22-31: 3.3% of 16616 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 Connecticut 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 Connecticut

Best counties

Share of checklists at the peak
  1. New Haven CountyBest late April · 5410 checklists that week, 139,721 in all66%
  2. New London CountyBest early May · 1919 checklists that week, 65,205 in all61%
  3. Windham CountyBest late April · 721 checklists that week, 19,034 in all60%
  4. Litchfield CountyBest late April · 2305 checklists that week, 69,766 in all59%
  5. Middlesex CountyBest late April · 1582 checklists that week, 39,919 in all59%
  6. Tolland CountyBest late April · 1577 checklists that week, 39,004 in all55%

Best spots

Share of checklists at the peak
  1. Fredrick White FarmMiddlesex County, best late June · 27 checklists that week, 1,286 in all100%
  2. Glastonbury MeadowsHartford County, best late October · 23 checklists that week, 683 in all100%
  3. Johnson MillpondMiddlesex County, best late June · 37 checklists that week, 1,288 in all100%
  4. Lake WackawanaFairfield County, best late April · 20 checklists that week, 304 in all100%
  5. Air Line State Park TrailTolland County, best early May · 37 checklists that week, 793 in all99%

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

Best time of day

In Connecticut, the Red-winged Blackbird is most often listed on checklists started between 6 and 8 am (36% of those checklists).

0%10%20%30%40%12 am: too few checklists (325) to judge1 am: too few checklists (367) to judge2 am: too few checklists (488) to judge3 am: too few checklists (792) to judge4 am: too few checklists (2722) to judge5 am: too few checklists (9489) to judge6 am: 38% of 33657 checklists7 am: 35% of 62964 checklists8 am: 34% of 70645 checklists9 am: 29% of 64870 checklists10 am: 26% of 58827 checklists11 am: 23% of 51689 checklists12 pm: 21% of 45288 checklists1 pm: 21% of 44765 checklists2 pm: 21% of 44173 checklists3 pm: 22% of 41979 checklists4 pm: 28% of 33219 checklists5 pm: 33% of 24828 checklists6 pm: 35% of 15856 checklists7 pm: too few checklists (8126) to judge8 pm: too few checklists (1994) to judge9 pm: too few checklists (533) to judge10 pm: too few checklists (349) to judge11 pm: too few checklists (286) 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
January3.5%4.0%4.9%4.3%
February4.5%7.2%14%25%
March34%39%41%44%
April47%52%56%59%
May59%57%55%54%
June51%50%47%43%
July43%42%38%32%
August23%16%11%8.9%
September7.2%5.6%5.0%6.0%
October8.4%11%14%14%
November14%12%10%7.0%
December5.2%4.6%4.8%3.3%

Neighboring states

  • Rhode Island: arrives the second week of February, 3 weeks earlier than Connecticut
  • Massachusetts: arrives early March, in the same week than Connecticut
  • New Jersey: arrives early March, in the same week than Connecticut
  • New York: arrives early February, 4 weeks earlier than Connecticut

Common questions

When do Red-winged Blackbirds arrive in Connecticut?
Red-winged Blackbirds are in Connecticut all year, but most are here in spring: numbers build from early March, peak in late April (58% of checklists), and fall back by mid July. In the quietest week (early January) they are still on about 3.5% of checklists.
When do Red-winged Blackbirds leave Connecticut?
Red-winged Blackbirds never fully leave Connecticut: numbers fall back below half their usual rate by mid July, but some are still reported in every week, about 3.5% of checklists at the low.
When is the best time to see a Red-winged Blackbird in Connecticut?
The Red-winged Blackbird is reported most often in late April, on about 58% of Connecticut checklists.
Where in Connecticut are Red-winged Blackbirds seen most often?
By county, New Haven County, New London County, and Windham County have the highest peak reporting rates for the Red-winged Blackbird (counties with at least 200 checklists).