WhenToBird

Zonotrichia albicollis · Passerellidae

When Do White-throated Sparrows Arrive in Connecticut?

Adult White-throated Sparrow
Photo: northerly, CC BY 4.0 via iNaturalist

White-throated Sparrows are winter birds in Connecticut: the first arrive in mid September, they are common by late September, peak in late October (50% of checklists), and most are gone by the second week of May.

When to look

First arrivalsSep 15-21mid September
Common bySep 22-30late September
PeakOct 22-31late October
Most gone byMay 8-14the second week of May

Best: late October. First arrivals mid September; most are gone by the second week of May. Peak: on about 50% of Connecticut checklists.

  1. Jancommon
  2. Febcommon
  3. Marcommon
  4. Aprpeak season
  5. Maycommon
  6. Junnot usually seen
  7. Julnot usually seen
  8. Augnot usually seen
  9. Sepuncommon
  10. Octpeak season
  11. Novpeak season
  12. Decpeak season

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

0%20%40%60%Jan 1-7: 33% of 18950 checklistsJan 8-14: 33% of 13676 checklistsJan 15-21: 35% of 13377 checklistsJan 22-31: 36% of 17004 checklistsFeb 1-7: 36% of 10218 checklistsFeb 8-14: 36% of 11568 checklistsFeb 15-21: 36% of 15916 checklistsFeb 22-28: 34% of 11413 checklistsMar 1-7: 32% of 10754 checklistsMar 8-14: 30% of 12051 checklistsMar 15-21: 28% of 12616 checklistsMar 22-31: 28% of 17801 checklistsApr 1-7: 32% of 13186 checklistsApr 8-14: 38% of 14428 checklistsApr 15-21: 43% of 14738 checklistsApr 22-30: 42% of 21753 checklistsMay 1-7: 33% of 22494 checklistsMay 8-14: 18% of 23363 checklistsMay 15-21: 3.9% of 20219 checklistsMay 22-31: 0.6% of 20778 checklistsJun 1-7: 0.3% of 12234 checklistsJun 8-14: 0.3% of 12491 checklistsJun 15-21: 0.2% of 10856 checklistsJun 22-30: 0.1% of 11964 checklistsJul 1-7: 0.1% of 9437 checklistsJul 8-14: 0.1% of 8599 checklistsJul 15-21: 0.1% of 8252 checklistsJul 22-31: 0.1% of 11329 checklistsAug 1-7: 0.1% of 8116 checklistsAug 8-14: 0.1% of 8051 checklistsAug 15-21: 0.1% of 8502 checklistsAug 22-31: 0.1% of 13673 checklistsSep 1-7: 0.1% of 9873 checklistsSep 8-14: 0.6% of 9735 checklistsSep 15-21: 5.8% of 10120 checklistsSep 22-30: 18% of 12543 checklistsOct 1-7: 35% of 10735 checklistsOct 8-14: 44% of 10869 checklistsOct 15-21: 50% of 10436 checklistsOct 22-31: 51% of 13808 checklistsNov 1-7: 48% of 10507 checklistsNov 8-14: 46% of 9827 checklistsNov 15-21: 44% of 9904 checklistsNov 22-30: 41% of 13396 checklistsDec 1-7: 42% of 8974 checklistsDec 8-14: 42% of 9468 checklistsDec 15-21: 43% of 11614 checklistsDec 22-31: 40% 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.

Embed this map on your site

Where in Connecticut

Best counties

Share of checklists at the peak
  1. Litchfield CountyBest mid October · 1062 checklists that week, 69,766 in all59%
  2. New London CountyBest the second week of November · 1064 checklists that week, 65,205 in all56%
  3. Fairfield CountyBest late October · 3366 checklists that week, 139,848 in all52%
  4. New Haven CountyBest late October · 3368 checklists that week, 139,721 in all51%
  5. Middlesex CountyBest late October · 844 checklists that week, 39,919 in all49%
  6. Windham CountyBest early November · 282 checklists that week, 19,034 in all46%

Best spots

Share of checklists at the peak
  1. Glastonbury MeadowsHartford County, best late October · 23 checklists that week, 683 in all100%
  2. Veterans ParkFairfield County, best mid November · 55 checklists that week, 589 in all99%
  3. Sasco CreekFairfield County, best the second week of October · 45 checklists that week, 899 in all96%
  4. Fitzgerald PropertyNew Haven County, best mid October · 42 checklists that week, 724 in all95%

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

Best time of day

In Connecticut, the White-throated Sparrow is most often listed on checklists started between 7 and 9 am (33% 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: 29% of 33657 checklists7 am: 34% of 62964 checklists8 am: 32% of 70645 checklists9 am: 28% of 64870 checklists10 am: 25% of 58827 checklists11 am: 24% of 51689 checklists12 pm: 23% of 45288 checklists1 pm: 23% of 44765 checklists2 pm: 23% of 44173 checklists3 pm: 24% of 41979 checklists4 pm: 23% of 33219 checklists5 pm: 17% of 24828 checklists6 pm: 11% 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
January33%33%35%36%
February36%36%36%34%
March32%30%28%28%
April32%38%43%42%
May33%18%3.9%0.6%
June0.3%0.3%0.2%0.1%
July0.1%0.1%0.1%0.1%
August0.1%0.1%0.1%0.1%
September0.1%0.6%5.8%18%
October35%44%50%51%
November48%46%44%41%
December42%42%43%40%

Neighboring states

  • Rhode Island: arrives mid September, in the same week than Connecticut
  • Massachusetts: arrives the second week of September, 1 week earlier than Connecticut
  • New Jersey: arrives late September, 1 week later than Connecticut
  • New York: arrives the second week of September, 1 week earlier than Connecticut

Common questions

When do White-throated Sparrows arrive in Connecticut?
White-throated Sparrows are winter birds in Connecticut: the first arrive in mid September, they are common by late September, peak in late October (50% of checklists), and most are gone by the second week of May.
When do White-throated Sparrows leave Connecticut?
Most White-throated Sparrows have left Connecticut by the second week of May, when reports fall below half their usual rate. Stragglers are still reported until mid May.
When is the best time to see a White-throated Sparrow in Connecticut?
The White-throated Sparrow is reported most often in late October, on about 50% of Connecticut checklists.
Where in Connecticut are White-throated Sparrows seen most often?
By county, Litchfield County, New London County, and Fairfield County have the highest peak reporting rates for the White-throated Sparrow (counties with at least 200 checklists).