WhenToBird

Tachycineta bicolor · Hirundinidae

When Do Tree Swallows Arrive in Indiana?

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

Tree Swallows reach Indiana in early March, are common by mid March, peak in mid April (27% of checklists), and most are gone by early August.

When to look

First arrivalsMar 1-7early March
Common byMar 15-21mid March
PeakApr 15-21mid April
Most gone byAug 1-7early August

Best: mid April. First arrivals early March; most are gone by early August. Peak: on about 27% of Indiana checklists.

  1. Jannot usually seen
  2. Febnot usually seen
  3. Marcommon
  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% of 18123 checklistsJan 8-14: 0.1% of 12006 checklistsJan 15-21: 0% of 12403 checklistsJan 22-31: 0.1% of 16181 checklistsFeb 1-7: 0.1% of 12546 checklistsFeb 8-14: 0.1% of 14250 checklistsFeb 15-21: 0.1% of 18077 checklistsFeb 22-28: 0.7% of 13590 checklistsMar 1-7: 2.4% of 14545 checklistsMar 8-14: 5.5% of 14594 checklistsMar 15-21: 11% of 13894 checklistsMar 22-31: 18% of 22400 checklistsApr 1-7: 23% of 18069 checklistsApr 8-14: 25% of 19579 checklistsApr 15-21: 28% of 19518 checklistsApr 22-30: 27% of 30544 checklistsMay 1-7: 25% of 28430 checklistsMay 8-14: 25% of 30624 checklistsMay 15-21: 26% of 22920 checklistsMay 22-31: 24% of 21234 checklistsJun 1-7: 22% of 12279 checklistsJun 8-14: 20% of 10904 checklistsJun 15-21: 21% of 9488 checklistsJun 22-30: 19% of 11362 checklistsJul 1-7: 17% of 9947 checklistsJul 8-14: 16% of 9585 checklistsJul 15-21: 13% of 8929 checklistsJul 22-31: 11% of 12639 checklistsAug 1-7: 10% of 9528 checklistsAug 8-14: 9.7% of 9451 checklistsAug 15-21: 7.9% of 9442 checklistsAug 22-31: 6.1% of 14969 checklistsSep 1-7: 4.7% of 12628 checklistsSep 8-14: 3.5% of 11793 checklistsSep 15-21: 2.5% of 11396 checklistsSep 22-30: 3.9% of 14203 checklistsOct 1-7: 4.5% of 11365 checklistsOct 8-14: 5.8% of 12092 checklistsOct 15-21: 5.9% of 10440 checklistsOct 22-31: 3.4% of 13883 checklistsNov 1-7: 1.1% of 10476 checklistsNov 8-14: 0.2% of 9776 checklistsNov 15-21: 0.1% of 9035 checklistsNov 22-30: 0.1% of 12547 checklistsDec 1-7: 0.1% of 9078 checklistsDec 8-14: 0.1% of 8732 checklistsDec 15-21: 0.1% of 11024 checklistsDec 22-31: 0% of 15432 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 Indiana 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 Indiana

Best counties

Share of checklists at the peak
  1. Scott CountyBest early May · 16 checklists that week, 798 in all71%
  2. Blackford CountyBest late May · 24 checklists that week, 962 in all68%
  3. Benton CountyBest the second week of August · 41 checklists that week, 993 in all60%
  4. Clinton CountyBest the second week of June · 15 checklists that week, 900 in all59%
  5. Dearborn CountyBest late April · 105 checklists that week, 2,838 in all52%
  6. Switzerland CountyBest mid May · 17 checklists that week, 1,318 in all49%

Best spots

Share of checklists at the peak
  1. Cikana State Fish HatcheryMorgan County, best early May · 25 checklists that week, 953 in all96%
  2. Old Channel LakeDearborn County, best early May · 27 checklists that week, 910 in all96%
  3. Vaughn HollowBrown County, best mid April · 51 checklists that week, 919 in all95%
  4. Forest LakeMarion County, best the second week of June · 45 checklists that week, 1,119 in all93%
  5. Eagle Marsh (Country Club Gardens)Allen County, best the second week of April · 28 checklists that week, 915 in all93%

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

Best time of day

In Indiana, the Tree Swallow is most often listed on checklists started between 6 and 8 am (16% of those checklists).

0%10%20%30%12 am: too few checklists (240) to judge1 am: too few checklists (231) to judge2 am: too few checklists (222) to judge3 am: too few checklists (202) to judge4 am: too few checklists (674) to judge5 am: too few checklists (4329) to judge6 am: 21% of 20589 checklists7 am: 14% of 58470 checklists8 am: 11% of 86931 checklists9 am: 11% of 78239 checklists10 am: 11% of 66080 checklists11 am: 11% of 54904 checklists12 pm: 9.7% of 47610 checklists1 pm: 9.9% of 44814 checklists2 pm: 9.2% of 43790 checklists3 pm: 9.5% of 42983 checklists4 pm: 9.6% of 45349 checklists5 pm: 11% of 35993 checklists6 pm: 13% of 26447 checklists7 pm: 13% of 17740 checklists8 pm: too few checklists (7603) to judge9 pm: too few checklists (1721) to judge10 pm: too few checklists (517) to judge11 pm: too few checklists (272) 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%0.1%0%0.1%
February0.1%0.1%0.1%0.7%
March2.4%5.5%11%18%
April23%25%28%27%
May25%25%26%24%
June22%20%21%19%
July17%16%13%11%
August10%9.7%7.9%6.1%
September4.7%3.5%2.5%3.9%
October4.5%5.8%5.9%3.4%
November1.1%0.2%0.1%0.1%
December0.1%0.1%0.1%0%

Neighboring states

  • Illinois: arrives the second week of March, 1 week later than Indiana
  • Kentucky: arrives early March, in the same week than Indiana
  • Ohio: arrives the second week of March, 1 week later than Indiana
  • Michigan: arrives mid March, 2 weeks later than Indiana

Common questions

When do Tree Swallows arrive in Indiana?
Tree Swallows reach Indiana in early March, are common by mid March, peak in mid April (27% of checklists), and most are gone by early August.
When do Tree Swallows leave Indiana?
Most Tree Swallows have left Indiana by early August, when reports fall below half their usual rate. Stragglers are still reported until late October.
When is the best time to see a Tree Swallow in Indiana?
The Tree Swallow is reported most often in mid April, on about 27% of Indiana checklists.
Where in Indiana are Tree Swallows seen most often?
By county, Scott County, Blackford County, and Benton County have the highest peak reporting rates for the Tree Swallow (counties with at least 200 checklists).