WhenToBird

Stelgidopteryx serripennis · Hirundinidae

When Do Northern Rough-winged Swallows Arrive in Louisiana?

Adult Northern Rough-winged Swallow
Photo: Peter Chen 2.0, CC BY 4.0 via iNaturalist

Northern Rough-winged Swallows are winter birds in Louisiana: the first arrive in early March, they are common by the second week of March, peak in the second week of October (6.9% of checklists), and most are gone by early November.

When to look

First arrivalsMar 1-7early March
Common byMar 8-14the second week of March
PeakOct 8-14the second week of October
Most gone byNov 1-7early November

Best: the second week of October. First arrivals early March; most are gone by early November. Peak: on about 6.9% of Louisiana checklists.

  1. Jannot usually seen
  2. Febrare
  3. Marcommon
  4. Aprcommon
  5. Maycommon
  6. Juncommon
  7. Julcommon
  8. Augcommon
  9. Sepcommon
  10. Octpeak season
  11. Novcommon
  12. Decnot usually seen

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

0%5%10%Jan 1-7: 0.2% of 8384 checklistsJan 8-14: 0.1% of 6265 checklistsJan 15-21: 0.1% of 6825 checklistsJan 22-31: 0.1% of 8776 checklistsFeb 1-7: 0.1% of 5956 checklistsFeb 8-14: 0.1% of 6291 checklistsFeb 15-21: 0.1% of 8044 checklistsFeb 22-28: 0.3% of 5946 checklistsMar 1-7: 1.0% of 5981 checklistsMar 8-14: 1.7% of 6307 checklistsMar 15-21: 3.4% of 6747 checklistsMar 22-31: 3.4% of 10487 checklistsApr 1-7: 4.7% of 8037 checklistsApr 8-14: 4.8% of 9577 checklistsApr 15-21: 5.0% of 11372 checklistsApr 22-30: 3.5% of 14344 checklistsMay 1-7: 3.1% of 8193 checklistsMay 8-14: 2.4% of 6823 checklistsMay 15-21: 1.7% of 4818 checklistsMay 22-31: 1.8% of 6206 checklistsJun 1-7: 1.9% of 3660 checklistsJun 8-14: 2.8% of 3455 checklistsJun 15-21: 2.2% of 3084 checklistsJun 22-30: 3.3% of 3904 checklistsJul 1-7: 2.6% of 3240 checklistsJul 8-14: 2.2% of 3235 checklistsJul 15-21: 2.3% of 3167 checklistsJul 22-31: 2.9% of 4328 checklistsAug 1-7: 3.4% of 3192 checklistsAug 8-14: 3.1% of 3394 checklistsAug 15-21: 3.5% of 3502 checklistsAug 22-31: 4.5% of 5658 checklistsSep 1-7: 4.5% of 4366 checklistsSep 8-14: 3.9% of 4648 checklistsSep 15-21: 2.9% of 4369 checklistsSep 22-30: 3.7% of 6418 checklistsOct 1-7: 4.4% of 5375 checklistsOct 8-14: 8.0% of 6213 checklistsOct 15-21: 8.2% of 5553 checklistsOct 22-31: 5.3% of 8879 checklistsNov 1-7: 2.5% of 6231 checklistsNov 8-14: 0.9% of 5011 checklistsNov 15-21: 0.3% of 4856 checklistsNov 22-30: 0.1% of 6696 checklistsDec 1-7: 0.1% of 4530 checklistsDec 8-14: 0.1% of 4883 checklistsDec 15-21: 0.1% of 5833 checklistsDec 22-31: 0.1% of 9940 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 Louisiana 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 Louisiana

Best counties

Share of checklists at the peak
  1. Concordia ParishBest late August · 24 checklists that week, 983 in all51%
  2. Pointe Coupee ParishBest mid October · 11 checklists that week, 593 in all50%
  3. Iberville ParishBest early August · 67 checklists that week, 2,343 in all49%
  4. Avoyelles ParishBest late July · 11 checklists that week, 432 in all44%
  5. Acadia ParishBest the second week of October · 101 checklists that week, 4,718 in all34%
  6. West Baton Rouge ParishBest late June · 11 checklists that week, 519 in all33%

Best spots

Share of checklists at the peak
  1. Sherburne Wildlife Management Area/atchafalaya National Wildlife Refuge/bayou Des Ourses Area (usacoe)Iberville Parish, best late July · 44 checklists that week, 374 in all80%
  2. City-Brooks Community ParkEast Baton Rouge Parish, best mid October · 35 checklists that week, 1,603 in all45%
  3. Irish Bayou LagoonOrleans Parish, best late April · 22 checklists that week, 365 in all38%
  4. Red River National Wildlife Refuge (southeast)Red River Parish, best mid March · 24 checklists that week, 657 in all34%

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

Best time of day

In Louisiana, the Northern Rough-winged Swallow is most often listed on checklists started between 6 and 8 am (3.6% of those checklists).

0%2%4%6%12 am: too few checklists (110) to judge1 am: too few checklists (95) to judge2 am: too few checklists (78) to judge3 am: too few checklists (145) to judge4 am: too few checklists (266) to judge5 am: too few checklists (2981) to judge6 am: 4.0% of 21115 checklists7 am: 3.4% of 38843 checklists8 am: 2.6% of 36306 checklists9 am: 2.6% of 31934 checklists10 am: 2.2% of 27208 checklists11 am: 2.1% of 20733 checklists12 pm: 1.8% of 18505 checklists1 pm: 2.0% of 17383 checklists2 pm: 1.8% of 17422 checklists3 pm: 1.8% of 17005 checklists4 pm: 1.9% of 17170 checklists5 pm: 2.4% of 12536 checklists6 pm: 2.5% of 8080 checklists7 pm: too few checklists (3798) to judge8 pm: too few checklists (676) to judge9 pm: too few checklists (311) to judge10 pm: too few checklists (206) to judge11 pm: too few checklists (93) 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
January0.2%0.1%0.1%0.1%
February0.1%0.1%0.1%0.3%
March1.0%1.7%3.4%3.4%
April4.7%4.8%5.0%3.5%
May3.1%2.4%1.7%1.8%
June1.9%2.8%2.2%3.3%
July2.6%2.2%2.3%2.9%
August3.4%3.1%3.5%4.5%
September4.5%3.9%2.9%3.7%
October4.4%8.0%8.2%5.3%
November2.5%0.9%0.3%0.1%
December0.1%0.1%0.1%0.1%

Neighboring states

  • Mississippi: arrives early March, in the same week than Louisiana
  • Alabama: arrives early March, in the same week than Louisiana
  • Texas: arrives mid February, 2 weeks earlier than Louisiana
  • Arkansas: arrives the second week of March, 1 week later than Louisiana

Common questions

When do Northern Rough-winged Swallows arrive in Louisiana?
Northern Rough-winged Swallows are winter birds in Louisiana: the first arrive in early March, they are common by the second week of March, peak in the second week of October (6.9% of checklists), and most are gone by early November.
When do Northern Rough-winged Swallows leave Louisiana?
Most Northern Rough-winged Swallows have left Louisiana by early November, when reports fall below half their usual rate. Stragglers are still reported until the second week of November.
When is the best time to see a Northern Rough-winged Swallow in Louisiana?
The Northern Rough-winged Swallow is reported most often in the second week of October, on about 6.9% of Louisiana checklists.
Where in Louisiana are Northern Rough-winged Swallows seen most often?
By county, Concordia Parish, Pointe Coupee Parish, and Iberville Parish have the highest peak reporting rates for the Northern Rough-winged Swallow (counties with at least 200 checklists).