WhenToBird

Certhia americana · Certhiidae

When Do Brown Creepers Arrive in Connecticut?

Adult Brown Creeper
Photo: Melanie Gaddy, CC0 1.0 via iNaturalist

Brown Creepers are winter birds in Connecticut: the first arrive in late August, they are common by the second week of September, peak in mid October (5.3% of checklists), and most are gone by late July.

When to look

First arrivalsAug 22-31late August
Common bySep 8-14the second week of September
PeakOct 15-21mid October
Most gone byJul 22-31late July

Best: mid October. First arrivals late August; most are gone by late July. Peak: on about 5.3% of Connecticut checklists.

  1. Jancommon
  2. Febcommon
  3. Marpeak season
  4. Aprpeak season
  5. Maycommon
  6. Juncommon
  7. Juluncommon
  8. Auguncommon
  9. Sepcommon
  10. Octpeak season
  11. Novpeak season
  12. Deccommon

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

0%2%4%6%Jan 1-7: 2.9% of 18950 checklistsJan 8-14: 2.8% of 13676 checklistsJan 15-21: 2.7% of 13377 checklistsJan 22-31: 2.7% of 17004 checklistsFeb 1-7: 2.8% of 10218 checklistsFeb 8-14: 2.9% of 11568 checklistsFeb 15-21: 2.6% of 15916 checklistsFeb 22-28: 3.1% of 11413 checklistsMar 1-7: 3.0% of 10754 checklistsMar 8-14: 3.1% of 12051 checklistsMar 15-21: 3.6% of 12616 checklistsMar 22-31: 3.9% of 17801 checklistsApr 1-7: 5.1% of 13186 checklistsApr 8-14: 5.2% of 14428 checklistsApr 15-21: 3.8% of 14738 checklistsApr 22-30: 2.7% of 21753 checklistsMay 1-7: 2.0% of 22494 checklistsMay 8-14: 1.8% of 23363 checklistsMay 15-21: 1.8% of 20219 checklistsMay 22-31: 2.2% of 20778 checklistsJun 1-7: 2.1% of 12234 checklistsJun 8-14: 2.3% of 12491 checklistsJun 15-21: 2.3% of 10856 checklistsJun 22-30: 2.1% of 11964 checklistsJul 1-7: 1.8% of 9437 checklistsJul 8-14: 1.7% of 8599 checklistsJul 15-21: 1.6% of 8252 checklistsJul 22-31: 1.6% of 11329 checklistsAug 1-7: 1.3% of 8116 checklistsAug 8-14: 1.0% of 8051 checklistsAug 15-21: 0.9% of 8502 checklistsAug 22-31: 1.0% of 13673 checklistsSep 1-7: 1.2% of 9873 checklistsSep 8-14: 1.7% of 9735 checklistsSep 15-21: 1.8% of 10120 checklistsSep 22-30: 2.8% of 12543 checklistsOct 1-7: 4.8% of 10735 checklistsOct 8-14: 5.6% of 10869 checklistsOct 15-21: 5.2% of 10436 checklistsOct 22-31: 5.1% of 13808 checklistsNov 1-7: 4.6% of 10507 checklistsNov 8-14: 3.9% of 9827 checklistsNov 15-21: 4.1% of 9904 checklistsNov 22-30: 4.0% of 13396 checklistsDec 1-7: 3.5% of 8974 checklistsDec 8-14: 3.5% of 9468 checklistsDec 15-21: 3.7% of 11614 checklistsDec 22-31: 3.7% 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. Litchfield CountyBest the second week of October · 1137 checklists that week, 69,766 in all11%
  2. Windham CountyBest late November · 297 checklists that week, 19,034 in all5.9%
  3. Hartford CountyBest early April · 2079 checklists that week, 105,735 in all5.6%
  4. New Haven CountyBest mid October · 2657 checklists that week, 139,721 in all5.4%
  5. Fairfield CountyBest mid October · 2417 checklists that week, 139,848 in all5.4%
  6. Middlesex CountyBest late March · 1212 checklists that week, 39,919 in all4.4%

Best spots

Share of checklists at the peak
  1. Addison PondHartford County, best early June · 24 checklists that week, 691 in all59%
  2. Great PondHartford County, best late March · 76 checklists that week, 966 in all43%
  3. Cranberry BogMiddlesex County, best late March · 25 checklists that week, 364 in all42%
  4. Camp PondLitchfield County, best late December · 20 checklists that week, 150 in all39%
  5. Trout Brook ValleyFairfield County, best the second week of January · 20 checklists that week, 1,588 in all39%

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

Best time of day

In Connecticut, the Brown Creeper is most often listed on checklists started between 7 and 9 am (3.5% of those checklists).

0%1%2%3%4%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: 2.9% of 33657 checklists7 am: 3.4% of 62964 checklists8 am: 3.5% of 70645 checklists9 am: 3.1% of 64870 checklists10 am: 2.9% of 58827 checklists11 am: 2.9% of 51689 checklists12 pm: 3.0% of 45288 checklists1 pm: 3.2% of 44765 checklists2 pm: 3.2% of 44173 checklists3 pm: 2.8% of 41979 checklists4 pm: 2.4% of 33219 checklists5 pm: 2.0% of 24828 checklists6 pm: 1.2% 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
January2.9%2.8%2.7%2.7%
February2.8%2.9%2.6%3.1%
March3.0%3.1%3.6%3.9%
April5.1%5.2%3.8%2.7%
May2.0%1.8%1.8%2.2%
June2.1%2.3%2.3%2.1%
July1.8%1.7%1.6%1.6%
August1.3%1.0%0.9%1.0%
September1.2%1.7%1.8%2.8%
October4.8%5.6%5.2%5.1%
November4.6%3.9%4.1%4.0%
December3.5%3.5%3.7%3.7%

Neighboring states

  • Rhode Island: arrives the second week of September, 2 weeks later than Connecticut
  • Massachusetts: arrives late August, in the same week than Connecticut
  • New Jersey: arrives late September, 4 weeks later than Connecticut
  • New York: arrives the second week of September, 2 weeks later than Connecticut

Common questions

When do Brown Creepers arrive in Connecticut?
Brown Creepers are winter birds in Connecticut: the first arrive in late August, they are common by the second week of September, peak in mid October (5.3% of checklists), and most are gone by late July.
When do Brown Creepers leave Connecticut?
Most Brown Creepers have left Connecticut by late July, when reports fall below half their usual rate. Stragglers are still reported until the second week of August.
When is the best time to see a Brown Creeper in Connecticut?
The Brown Creeper is reported most often in mid October, on about 5.3% of Connecticut checklists.
Where in Connecticut are Brown Creepers seen most often?
By county, Litchfield County, Windham County, and Hartford County have the highest peak reporting rates for the Brown Creeper (counties with at least 200 checklists).