WhenToBird

Passer domesticus · Passeridae

When Do House Sparrows Arrive in Connecticut?

Adult male House Sparrow
Photo: Esteban Poveda, CC BY 4.0 via iNaturalist

The House Sparrow is in Connecticut all year. It turns up on about 37% of checklists at its peak (the second week of July) and on 20% in its quietest week (the second week of September).

When to look

PresentAll year
Peak weekJul 8-14the second week of July
Quietest weekSep 8-14the second week of September

Best: the second week of July. Here all year. Peak: on about 37% of Connecticut checklists.

  1. Jancommon
  2. Febpeak season
  3. Marcommon
  4. Aprpeak season
  5. Maypeak season
  6. Junpeak season
  7. Julpeak season
  8. Augpeak season
  9. Sepcommon
  10. Octcommon
  11. Novcommon
  12. Deccommon

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

0%10%20%30%40%Jan 1-7: 21% of 18950 checklistsJan 8-14: 20% of 13676 checklistsJan 15-21: 22% of 13377 checklistsJan 22-31: 24% of 17004 checklistsFeb 1-7: 26% of 10218 checklistsFeb 8-14: 28% of 11568 checklistsFeb 15-21: 30% of 15916 checklistsFeb 22-28: 27% of 11413 checklistsMar 1-7: 28% of 10754 checklistsMar 8-14: 27% of 12051 checklistsMar 15-21: 26% of 12616 checklistsMar 22-31: 26% of 17801 checklistsApr 1-7: 27% of 13186 checklistsApr 8-14: 28% of 14428 checklistsApr 15-21: 29% of 14738 checklistsApr 22-30: 30% of 21753 checklistsMay 1-7: 31% of 22494 checklistsMay 8-14: 32% of 23363 checklistsMay 15-21: 29% of 20219 checklistsMay 22-31: 31% of 20778 checklistsJun 1-7: 34% of 12234 checklistsJun 8-14: 35% of 12491 checklistsJun 15-21: 34% of 10856 checklistsJun 22-30: 36% of 11964 checklistsJul 1-7: 37% of 9437 checklistsJul 8-14: 37% of 8599 checklistsJul 15-21: 37% of 8252 checklistsJul 22-31: 36% of 11329 checklistsAug 1-7: 34% of 8116 checklistsAug 8-14: 30% of 8051 checklistsAug 15-21: 27% of 8502 checklistsAug 22-31: 22% of 13673 checklistsSep 1-7: 21% of 9873 checklistsSep 8-14: 20% of 9735 checklistsSep 15-21: 20% of 10120 checklistsSep 22-30: 22% of 12543 checklistsOct 1-7: 25% of 10735 checklistsOct 8-14: 25% of 10869 checklistsOct 15-21: 27% of 10436 checklistsOct 22-31: 26% of 13808 checklistsNov 1-7: 25% of 10507 checklistsNov 8-14: 24% of 9827 checklistsNov 15-21: 24% of 9904 checklistsNov 22-30: 23% of 13396 checklistsDec 1-7: 25% of 8974 checklistsDec 8-14: 24% of 9468 checklistsDec 15-21: 24% of 11614 checklistsDec 22-31: 23% 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. Fairfield CountyBest early July · 1974 checklists that week, 139,848 in all46%
  2. New Haven CountyBest mid July · 1766 checklists that week, 139,721 in all46%
  3. Hartford CountyBest early July · 1543 checklists that week, 105,735 in all43%
  4. Tolland CountyBest the second week of July · 602 checklists that week, 39,004 in all36%
  5. New London CountyBest mid June · 998 checklists that week, 65,205 in all35%
  6. Middlesex CountyBest mid July · 474 checklists that week, 39,919 in all32%

Best spots

Share of checklists at the peak
  1. Brooksvale StreamNew Haven County, best the second week of August · 26 checklists that week, 167 in all98%
  2. Mineral Spring BrookNew London County, best late June · 21 checklists that week, 470 in all98%
  3. Cove HarborFairfield County, best mid April · 25 checklists that week, 818 in all94%
  4. Pirhala FarmFairfield County, best mid September · 22 checklists that week, 194 in all93%
  5. Fairfield BeachFairfield County, best late January · 23 checklists that week, 252 in all91%
  6. Fourteen Acre Pond (Cranbury)Fairfield County, best late February · 22 checklists that week, 705 in all90%

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

Best time of day

In Connecticut, the House Sparrow 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: 35% of 33657 checklists7 am: 37% of 62964 checklists8 am: 34% of 70645 checklists9 am: 30% of 64870 checklists10 am: 27% of 58827 checklists11 am: 24% of 51689 checklists12 pm: 23% of 45288 checklists1 pm: 23% of 44765 checklists2 pm: 23% of 44173 checklists3 pm: 22% of 41979 checklists4 pm: 23% of 33219 checklists5 pm: 25% of 24828 checklists6 pm: 26% 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
January21%20%22%24%
February26%28%30%27%
March28%27%26%26%
April27%28%29%30%
May31%32%29%31%
June34%35%34%36%
July37%37%37%36%
August34%30%27%22%
September21%20%20%22%
October25%25%27%26%
November25%24%24%23%
December25%24%24%23%

Neighboring states

Common questions

When do House Sparrows arrive in Connecticut?
The House Sparrow is in Connecticut all year. It turns up on about 37% of checklists at its peak (the second week of July) and on 20% in its quietest week (the second week of September).
When do House Sparrows leave Connecticut?
The House Sparrow does not leave Connecticut: it is reported all year, from 20% of checklists in the second week of September to 37% in the second week of July.
When is the best time to see a House Sparrow in Connecticut?
The House Sparrow is reported most often in the second week of July, on about 37% of Connecticut checklists.
Where in Connecticut are House Sparrows seen most often?
By county, Fairfield County, New Haven County, and Hartford County have the highest peak reporting rates for the House Sparrow (counties with at least 200 checklists).