WhenToBird

Tachycineta bicolor · Hirundinidae

When Do Tree Swallows Arrive in Tennessee?

Adult Tree Swallow
Photo: Carter Dorscht, CC0 1.0 via iNaturalist

Tree Swallows reach Tennessee in mid February, are common by early March, peak in the second week of April (23% of checklists), and most are gone by the second week of July.

When to look

First arrivalsFeb 15-21mid February
Common byMar 1-7early March
PeakApr 8-14the second week of April
Most gone byJul 8-14the second week of July

Best: the second week of April. First arrivals mid February; most are gone by the second week of July. Peak: on about 23% of Tennessee checklists.

  1. Jannot usually seen
  2. Febuncommon
  3. Marpeak season
  4. Aprpeak season
  5. Maypeak season
  6. Junpeak season
  7. Julcommon
  8. Auguncommon
  9. Sepuncommon
  10. Octuncommon
  11. Novrare
  12. Decnot usually seen

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

0%10%20%30%Jan 1-7: 0.1% of 16696 checklistsJan 8-14: 0.1% of 13056 checklistsJan 15-21: 0.1% of 13646 checklistsJan 22-31: 0.1% of 18071 checklistsFeb 1-7: 0.6% of 13342 checklistsFeb 8-14: 1.4% of 14316 checklistsFeb 15-21: 2.0% of 20395 checklistsFeb 22-28: 5.8% of 13129 checklistsMar 1-7: 10% of 12701 checklistsMar 8-14: 14% of 12789 checklistsMar 15-21: 19% of 13599 checklistsMar 22-31: 22% of 20293 checklistsApr 1-7: 23% of 15779 checklistsApr 8-14: 24% of 16646 checklistsApr 15-21: 22% of 18625 checklistsApr 22-30: 22% of 26689 checklistsMay 1-7: 22% of 21054 checklistsMay 8-14: 20% of 19954 checklistsMay 15-21: 21% of 14494 checklistsMay 22-31: 20% of 17790 checklistsJun 1-7: 19% of 11344 checklistsJun 8-14: 19% of 11049 checklistsJun 15-21: 18% of 9625 checklistsJun 22-30: 15% of 11522 checklistsJul 1-7: 13% of 9208 checklistsJul 8-14: 10% of 8814 checklistsJul 15-21: 8.9% of 8887 checklistsJul 22-31: 6.6% of 12739 checklistsAug 1-7: 4.8% of 9632 checklistsAug 8-14: 4.3% of 9514 checklistsAug 15-21: 4.0% of 9619 checklistsAug 22-31: 3.4% of 14227 checklistsSep 1-7: 3.7% of 11988 checklistsSep 8-14: 2.8% of 11660 checklistsSep 15-21: 3.5% of 11774 checklistsSep 22-30: 4.8% of 15658 checklistsOct 1-7: 3.9% of 12641 checklistsOct 8-14: 4.6% of 12389 checklistsOct 15-21: 5.6% of 10249 checklistsOct 22-31: 4.8% of 14085 checklistsNov 1-7: 2.4% of 10700 checklistsNov 8-14: 0.7% of 10709 checklistsNov 15-21: 0.1% of 9955 checklistsNov 22-30: 0.1% of 13423 checklistsDec 1-7: 0.1% of 10106 checklistsDec 8-14: 0.1% of 10478 checklistsDec 15-21: 0.1% of 12177 checklistsDec 22-31: 0% of 17397 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 Tennessee 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 Tennessee

Best counties

Share of checklists at the peak
  1. Hawkins CountyBest mid June · 187 checklists that week, 11,261 in all65%
  2. Grainger CountyBest late May · 36 checklists that week, 3,030 in all62%
  3. Roane CountyBest mid April · 195 checklists that week, 6,746 in all60%
  4. Haywood CountyBest the second week of April · 48 checklists that week, 1,498 in all57%
  5. Monroe CountyBest early July · 98 checklists that week, 5,763 in all53%
  6. Lake CountyBest mid October · 116 checklists that week, 5,235 in all49%

Best spots

Share of checklists at the peak
  1. Oak Ridge Wildlife Management AreaRoane County, best the second week of May · 26 checklists that week, 1,050 in all98%
  2. Stidman BranchSullivan County, best late April · 24 checklists that week, 572 in all97%
  3. River Bluff Small Wild AreaAnderson County, best the second week of April · 39 checklists that week, 1,201 in all97%
  4. Tennessee Valley Authority (TVA)Roane County, best the second week of June · 25 checklists that week, 1,062 in all96%
  5. Hines Creek ShoalsAnderson County, best late March · 56 checklists that week, 1,384 in all94%

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

Best time of day

In Tennessee, the Tree Swallow is most often listed on checklists started between 6 and 8 am (11% of those checklists).

0%5%10%15%12 am: too few checklists (224) to judge1 am: too few checklists (253) to judge2 am: too few checklists (245) to judge3 am: too few checklists (267) to judge4 am: too few checklists (582) to judge5 am: too few checklists (5688) to judge6 am: 12% of 36828 checklists7 am: 11% of 72816 checklists8 am: 10% of 76910 checklists9 am: 9.9% of 69071 checklists10 am: 9.9% of 60943 checklists11 am: 9.4% of 52311 checklists12 pm: 8.9% of 46524 checklists1 pm: 7.6% of 41133 checklists2 pm: 7.3% of 40305 checklists3 pm: 7.0% of 41013 checklists4 pm: 8.1% of 40029 checklists5 pm: 9.5% of 29775 checklists6 pm: 11% of 20977 checklists7 pm: too few checklists (12529) to judge8 pm: too few checklists (4456) to judge9 pm: too few checklists (1056) to judge10 pm: too few checklists (445) to judge11 pm: too few checklists (252) 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
January0.1%0.1%0.1%0.1%
February0.6%1.4%2.0%5.8%
March10%14%19%22%
April23%24%22%22%
May22%20%21%20%
June19%19%18%15%
July13%10%8.9%6.6%
August4.8%4.3%4.0%3.4%
September3.7%2.8%3.5%4.8%
October3.9%4.6%5.6%4.8%
November2.4%0.7%0.1%0.1%
December0.1%0.1%0.1%0%

Neighboring states

  • Kentucky: arrives early March, 2 weeks later than Tennessee
  • Georgia: arrives mid September, 20 weeks earlier than Tennessee
  • Alabama: arrives the second week of December, 9 weeks earlier than Tennessee
  • Indiana: arrives early March, 2 weeks later than Tennessee

Common questions

When do Tree Swallows arrive in Tennessee?
Tree Swallows reach Tennessee in mid February, are common by early March, peak in the second week of April (23% of checklists), and most are gone by the second week of July.
When do Tree Swallows leave Tennessee?
Most Tree Swallows have left Tennessee by the second week of July, when reports fall below half their usual rate. Stragglers are still reported until early November.
When is the best time to see a Tree Swallow in Tennessee?
The Tree Swallow is reported most often in the second week of April, on about 23% of Tennessee checklists.
Where in Tennessee are Tree Swallows seen most often?
By county, Hawkins County, Grainger County, and Roane County have the highest peak reporting rates for the Tree Swallow (counties with at least 200 checklists).