WhenToBird

Tachycineta bicolor · Hirundinidae

When Do Tree Swallows Arrive in Mississippi?

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

Tree Swallows reach Mississippi in late September, are common by early October, peak in early April (5.4% of checklists), and most are gone by late May.

When to look

First arrivalsSep 22-30late September
Common byOct 1-7early October
PeakApr 1-7early April
Most gone byMay 22-31late May

Best: early April. First arrivals late September; most are gone by late May. Peak: on about 5.4% of Mississippi checklists.

  1. Janpeak season
  2. Febcommon
  3. Marpeak season
  4. Aprpeak season
  5. Maycommon
  6. Jununcommon
  7. Juluncommon
  8. Auguncommon
  9. Sepuncommon
  10. Octpeak season
  11. Novpeak season
  12. Deccommon

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

0%2%4%6%Jan 1-7: 4.9% of 4836 checklistsJan 8-14: 4.2% of 3323 checklistsJan 15-21: 5.1% of 3400 checklistsJan 22-31: 4.6% of 4705 checklistsFeb 1-7: 2.6% of 3387 checklistsFeb 8-14: 2.0% of 3911 checklistsFeb 15-21: 1.8% of 4691 checklistsFeb 22-28: 2.3% of 3409 checklistsMar 1-7: 2.7% of 3276 checklistsMar 8-14: 3.7% of 3273 checklistsMar 15-21: 4.8% of 3552 checklistsMar 22-31: 5.3% of 5618 checklistsApr 1-7: 5.8% of 4432 checklistsApr 8-14: 5.3% of 4907 checklistsApr 15-21: 4.4% of 5239 checklistsApr 22-30: 3.0% of 7043 checklistsMay 1-7: 2.1% of 4597 checklistsMay 8-14: 2.4% of 4383 checklistsMay 15-21: 2.0% of 3088 checklistsMay 22-31: 1.5% of 3805 checklistsJun 1-7: 1.6% of 2658 checklistsJun 8-14: 1.1% of 2469 checklistsJun 15-21: 1.3% of 2112 checklistsJun 22-30: 1.0% of 2534 checklistsJul 1-7: 0.9% of 2099 checklistsJul 8-14: 0.7% of 1885 checklistsJul 15-21: 0.8% of 1811 checklistsJul 22-31: 0.8% of 2793 checklistsAug 1-7: 0.6% of 2045 checklistsAug 8-14: 0.9% of 2210 checklistsAug 15-21: 1.1% of 2437 checklistsAug 22-31: 1.2% of 3415 checklistsSep 1-7: 1.3% of 2837 checklistsSep 8-14: 0.7% of 2585 checklistsSep 15-21: 0.4% of 2870 checklistsSep 22-30: 1.3% of 3610 checklistsOct 1-7: 1.5% of 2938 checklistsOct 8-14: 2.6% of 3457 checklistsOct 15-21: 4.0% of 3168 checklistsOct 22-31: 5.4% of 3752 checklistsNov 1-7: 3.4% of 2847 checklistsNov 8-14: 3.7% of 2648 checklistsNov 15-21: 4.7% of 2599 checklistsNov 22-30: 2.9% of 3389 checklistsDec 1-7: 2.5% of 2419 checklistsDec 8-14: 1.7% of 2526 checklistsDec 15-21: 2.5% of 2966 checklistsDec 22-31: 2.3% of 4466 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 Mississippi 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 Mississippi

Best counties

Share of checklists at the peak
  1. Adams CountyBest early November · 35 checklists that week, 1,749 in all40%
  2. Yazoo CountyBest mid July · 12 checklists that week, 440 in all34%
  3. Holmes CountyBest mid April · 14 checklists that week, 242 in all29%
  4. Clay CountyBest the second week of April · 11 checklists that week, 531 in all28%
  5. Itawamba CountyBest early April · 18 checklists that week, 648 in all22%
  6. Tallahatchie CountyBest late March · 10 checklists that week, 303 in all21%

Best spots

Share of checklists at the peak
  1. Plymouth BluffLowndes County, best the second week of April · 27 checklists that week, 333 in all55%
  2. Irvin LakeJackson County, best the second week of January · 27 checklists that week, 407 in all26%
  3. Blue LakeJackson County, best late January · 49 checklists that week, 1,885 in all26%
  4. Hurricane LakeMadison County, best the second week of April · 70 checklists that week, 1,600 in all25%

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

Best time of day

In Mississippi, the Tree Swallow is most often listed on checklists started between 7 and 9 am (3.7% of those checklists).

0%1%2%3%4%12 am: too few checklists (54) to judge1 am: too few checklists (48) to judge2 am: too few checklists (28) to judge3 am: too few checklists (60) to judge4 am: too few checklists (114) to judge5 am: too few checklists (1139) to judge6 am: 2.9% of 9054 checklists7 am: 3.8% of 18481 checklists8 am: 3.6% of 17525 checklists9 am: 3.4% of 15482 checklists10 am: 3.3% of 14380 checklists11 am: 2.5% of 12728 checklists12 pm: 2.8% of 11009 checklists1 pm: 2.7% of 10651 checklists2 pm: 2.6% of 10787 checklists3 pm: 2.7% of 11221 checklists4 pm: 2.1% of 11861 checklists5 pm: 1.8% of 8854 checklists6 pm: 1.1% of 6018 checklists7 pm: too few checklists (2387) to judge8 pm: too few checklists (314) to judge9 pm: too few checklists (114) to judge10 pm: too few checklists (63) to judge11 pm: too few checklists (48) 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
January4.9%4.2%5.1%4.6%
February2.6%2.0%1.8%2.3%
March2.7%3.7%4.8%5.3%
April5.8%5.3%4.4%3.0%
May2.1%2.4%2.0%1.5%
June1.6%1.1%1.3%1.0%
July0.9%0.7%0.8%0.8%
August0.6%0.9%1.1%1.2%
September1.3%0.7%0.4%1.3%
October1.5%2.6%4.0%5.4%
November3.4%3.7%4.7%2.9%
December2.5%1.7%2.5%2.3%

Neighboring states

  • Alabama: arrives the second week of December, 10 weeks later than Mississippi
  • Louisiana: arrives mid August, 5 weeks earlier than Mississippi
  • Arkansas: arrives early March, 21 weeks later than Mississippi
  • Georgia: arrives mid September, 1 week earlier than Mississippi

Common questions

When do Tree Swallows arrive in Mississippi?
Tree Swallows reach Mississippi in late September, are common by early October, peak in early April (5.4% of checklists), and most are gone by late May.
When do Tree Swallows leave Mississippi?
Most Tree Swallows have left Mississippi by late May, when reports fall below half their usual rate. Stragglers are still reported until late June.
When is the best time to see a Tree Swallow in Mississippi?
The Tree Swallow is reported most often in early April, on about 5.4% of Mississippi checklists.
Where in Mississippi are Tree Swallows seen most often?
By county, Adams County, Yazoo County, and Holmes County have the highest peak reporting rates for the Tree Swallow (counties with at least 200 checklists).