WhenToBird

Spizelloides arborea · Passerellidae

When Do American Tree Sparrows Arrive in Vermont?

Adult American Tree Sparrow
Photo: Michael, CC BY 4.0 via iNaturalist

American Tree Sparrows are winter birds in Vermont: the first arrive in late October, they are common by the second week of November, peak in late January (17% of checklists), and most are gone by early April.

When to look

First arrivalsOct 22-31late October
Common byNov 8-14the second week of November
PeakJan 22-31late January
Most gone byApr 1-7early April

Best: late January. First arrivals late October; most are gone by early April. Peak: on about 17% of Vermont checklists.

  1. Janpeak season
  2. Febpeak season
  3. Marcommon
  4. Aprcommon
  5. Maynot usually seen
  6. Junnot usually seen
  7. Julnot usually seen
  8. Augnot usually seen
  9. Sepnot usually seen
  10. Octuncommon
  11. Novcommon
  12. Decpeak season

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

0%5%10%15%20%Jan 1-7: 14% of 12234 checklistsJan 8-14: 15% of 8293 checklistsJan 15-21: 17% of 7885 checklistsJan 22-31: 17% of 10534 checklistsFeb 1-7: 15% of 7212 checklistsFeb 8-14: 14% of 8144 checklistsFeb 15-21: 14% of 10480 checklistsFeb 22-28: 13% of 7932 checklistsMar 1-7: 13% of 8192 checklistsMar 8-14: 11% of 9383 checklistsMar 15-21: 9.6% of 10620 checklistsMar 22-31: 10% of 16257 checklistsApr 1-7: 9.1% of 12568 checklistsApr 8-14: 6.1% of 14677 checklistsApr 15-21: 3.6% of 14106 checklistsApr 22-30: 1.5% of 19617 checklistsMay 1-7: 0.2% of 18143 checklistsMay 8-14: 0.1% of 19626 checklistsMay 15-21: 0% of 17779 checklistsMay 22-31: 0% of 20310 checklistsJun 1-7: 0% of 11493 checklistsJun 8-14: 0% of 10215 checklistsJun 15-21: 0% of 9951 checklistsJun 22-30: 0% of 11050 checklistsJul 1-7: 0% of 8690 checklistsJul 8-14: 0% of 7679 checklistsJul 15-21: 0% of 7687 checklistsJul 22-31: 0% of 10712 checklistsAug 1-7: 0% of 7703 checklistsAug 8-14: 0% of 7743 checklistsAug 15-21: 0% of 8314 checklistsAug 22-31: 0% of 12428 checklistsSep 1-7: 0% of 9526 checklistsSep 8-14: 0% of 8493 checklistsSep 15-21: 0% of 8283 checklistsSep 22-30: 0% of 10352 checklistsOct 1-7: 0.1% of 8802 checklistsOct 8-14: 0.1% of 9088 checklistsOct 15-21: 0.3% of 7739 checklistsOct 22-31: 2.3% of 10907 checklistsNov 1-7: 5.5% of 7868 checklistsNov 8-14: 9.4% of 7223 checklistsNov 15-21: 10% of 7224 checklistsNov 22-30: 11% of 8375 checklistsDec 1-7: 11% of 6580 checklistsDec 8-14: 13% of 6800 checklistsDec 15-21: 12% of 8334 checklistsDec 22-31: 15% of 10579 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 Vermont 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 Vermont

Best counties

Share of checklists at the peak
  1. Orleans CountyBest mid January · 150 checklists that week, 11,785 in all37%
  2. Lamoille CountyBest mid January · 176 checklists that week, 16,426 in all29%
  3. Essex CountyBest mid February · 120 checklists that week, 9,416 in all28%
  4. Caledonia CountyBest mid December · 137 checklists that week, 10,534 in all25%
  5. Rutland CountyBest mid January · 757 checklists that week, 46,909 in all21%
  6. Addison CountyBest early February · 1319 checklists that week, 77,064 in all20%

Best spots

Share of checklists at the peak
  1. Lake RunnenedeWindsor County, best mid January · 39 checklists that week, 2,137 in all67%
  2. Little Otter Creek Wildlife Management Area (East Slang Creek)Addison County, best late January · 24 checklists that week, 596 in all67%
  3. Herricks CoveWindham County, best late November · 26 checklists that week, 2,108 in all63%

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

Best time of day

In Vermont, the American Tree Sparrow is most often listed on checklists started between 8 and 10 am (6.4% of those checklists).

0%2%4%6%8%12 am: too few checklists (384) to judge1 am: too few checklists (418) to judge2 am: too few checklists (568) to judge3 am: too few checklists (1183) to judge4 am: too few checklists (3460) to judge5 am: 0.5% of 10340 checklists6 am: 3.7% of 30951 checklists7 am: 5.7% of 64150 checklists8 am: 6.7% of 70252 checklists9 am: 6.1% of 55280 checklists10 am: 6.1% of 47111 checklists11 am: 6.0% of 37615 checklists12 pm: 5.7% of 32195 checklists1 pm: 5.6% of 30185 checklists2 pm: 5.1% of 29679 checklists3 pm: 4.8% of 26483 checklists4 pm: 3.3% of 20110 checklists5 pm: 2.0% of 15993 checklists6 pm: 1.3% of 12110 checklists7 pm: too few checklists (8203) to judge8 pm: too few checklists (4425) to judge9 pm: too few checklists (1829) to judge10 pm: too few checklists (597) to judge11 pm: too few checklists (309) 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
January14%15%17%17%
February15%14%14%13%
March13%11%9.6%10%
April9.1%6.1%3.6%1.5%
May0.2%0.1%0%0%
June0%0%0%0%
July0%0%0%0%
August0%0%0%0%
September0%0%0%0%
October0.1%0.1%0.3%2.3%
November5.5%9.4%10%11%
December11%13%12%15%

Neighboring states

  • New Hampshire: arrives late October, in the same week than Vermont
  • Massachusetts: arrives early November, 1 week later than Vermont
  • Connecticut: arrives early November, 1 week later than Vermont
  • Rhode Island: arrives the second week of November, 2 weeks later than Vermont

Common questions

When do American Tree Sparrows arrive in Vermont?
American Tree Sparrows are winter birds in Vermont: the first arrive in late October, they are common by the second week of November, peak in late January (17% of checklists), and most are gone by early April.
When do American Tree Sparrows leave Vermont?
Most American Tree Sparrows have left Vermont by early April, when reports fall below half their usual rate. Stragglers are still reported until late April.
When is the best time to see a American Tree Sparrow in Vermont?
The American Tree Sparrow is reported most often in late January, on about 17% of Vermont checklists.
Where in Vermont are American Tree Sparrows seen most often?
By county, Orleans County, Lamoille County, and Essex County have the highest peak reporting rates for the American Tree Sparrow (counties with at least 200 checklists).