WhenToBird

Egretta caerulea · Ardeidae

When Do Little Blue Herons Arrive in Louisiana?

Adult Little Blue Heron
Photo: Luis G Restrepo, CC BY 4.0 via iNaturalist

Little Blue Herons are in Louisiana all year, but most are here in summer: numbers build from late March, peak in mid August (21% of checklists), and fall back by early October. In the quietest week (the second week of February) they are still on about 5.7% of checklists.

When to look

Numbers buildMar 22-31late March
PeakAug 15-21mid August
Fall back byOct 1-7early October
FewestFeb 8-14the second week of February

Best: mid August. Here all year; numbers build from late March and fall back by early October. Peak: on about 21% of Louisiana checklists.

  1. Januncommon
  2. Febuncommon
  3. Marcommon
  4. Aprcommon
  5. Maypeak season
  6. Junpeak season
  7. Julpeak season
  8. Augpeak season
  9. Seppeak season
  10. Octcommon
  11. Novcommon
  12. Decuncommon

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

0%10%20%30%Jan 1-7: 6.7% of 8384 checklistsJan 8-14: 5.9% of 6265 checklistsJan 15-21: 6.4% of 6825 checklistsJan 22-31: 5.7% of 8776 checklistsFeb 1-7: 6.9% of 5956 checklistsFeb 8-14: 5.5% of 6291 checklistsFeb 15-21: 5.0% of 8044 checklistsFeb 22-28: 7.1% of 5946 checklistsMar 1-7: 7.8% of 5981 checklistsMar 8-14: 10% of 6307 checklistsMar 15-21: 13% of 6747 checklistsMar 22-31: 15% of 10487 checklistsApr 1-7: 15% of 8037 checklistsApr 8-14: 15% of 9577 checklistsApr 15-21: 14% of 11372 checklistsApr 22-30: 13% of 14344 checklistsMay 1-7: 15% of 8193 checklistsMay 8-14: 15% of 6823 checklistsMay 15-21: 17% of 4818 checklistsMay 22-31: 17% of 6206 checklistsJun 1-7: 16% of 3660 checklistsJun 8-14: 19% of 3455 checklistsJun 15-21: 19% of 3084 checklistsJun 22-30: 20% of 3904 checklistsJul 1-7: 20% of 3240 checklistsJul 8-14: 19% of 3235 checklistsJul 15-21: 18% of 3167 checklistsJul 22-31: 19% of 4328 checklistsAug 1-7: 20% of 3192 checklistsAug 8-14: 22% of 3394 checklistsAug 15-21: 21% of 3502 checklistsAug 22-31: 21% of 5658 checklistsSep 1-7: 20% of 4366 checklistsSep 8-14: 17% of 4648 checklistsSep 15-21: 16% of 4369 checklistsSep 22-30: 17% of 6418 checklistsOct 1-7: 13% of 5375 checklistsOct 8-14: 13% of 6213 checklistsOct 15-21: 11% of 5553 checklistsOct 22-31: 9.8% of 8879 checklistsNov 1-7: 8.7% of 6231 checklistsNov 8-14: 8.5% of 5011 checklistsNov 15-21: 8.1% of 4856 checklistsNov 22-30: 7.4% of 6696 checklistsDec 1-7: 7.1% of 4530 checklistsDec 8-14: 7.4% of 4883 checklistsDec 15-21: 7.7% of 5833 checklistsDec 22-31: 7.7% 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. Richland ParishBest early August · 13 checklists that week, 835 in all91%
  2. Red River ParishBest late April · 36 checklists that week, 998 in all84%
  3. Acadia ParishBest early July · 67 checklists that week, 4,718 in all65%
  4. Iberia ParishBest late June · 19 checklists that week, 1,313 in all64%
  5. Iberville ParishBest the second week of June · 33 checklists that week, 2,343 in all62%
  6. Concordia ParishBest the second week of June · 31 checklists that week, 983 in all62%

Best spots

Share of checklists at the peak
  1. Red River National Wildlife Refuge (southeast)Red River Parish, best late April · 29 checklists that week, 657 in all98%
  2. Sherburne Wildlife Management Area/atchafalaya National Wildlife Refuge/bayou Des Ourses Area (usacoe)Iberville Parish, best early August · 30 checklists that week, 374 in all89%
  3. Lake la PointeSt. Martin Parish, best late June · 25 checklists that week, 1,443 in all88%
  4. Bayou Sauvage National Wildlife Refuge (2)Orleans Parish, best late March · 32 checklists that week, 697 in all82%

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

Best time of day

In Louisiana, the Little Blue Heron is most often listed on checklists started between 6 and 8 am (15% of those checklists).

0%5%10%15%20%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: 18% of 21115 checklists7 am: 14% of 38843 checklists8 am: 13% of 36306 checklists9 am: 12% of 31934 checklists10 am: 11% of 27208 checklists11 am: 11% of 20733 checklists12 pm: 11% of 18505 checklists1 pm: 11% of 17383 checklists2 pm: 11% of 17422 checklists3 pm: 10% of 17005 checklists4 pm: 10% of 17170 checklists5 pm: 11% of 12536 checklists6 pm: 12% 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
January6.7%5.9%6.4%5.7%
February6.9%5.5%5.0%7.1%
March7.8%10%13%15%
April15%15%14%13%
May15%15%17%17%
June16%19%19%20%
July20%19%18%19%
August20%22%21%21%
September20%17%16%17%
October13%13%11%9.8%
November8.7%8.5%8.1%7.4%
December7.1%7.4%7.7%7.7%

Neighboring states

  • Mississippi: arrives early March, 3 weeks earlier than Louisiana
  • Alabama: arrives the second week of March, 2 weeks earlier than Louisiana
  • Texas: arrives late June, 12 weeks later than Louisiana
  • Arkansas: arrives early May, 5 weeks later than Louisiana

Common questions

When do Little Blue Herons arrive in Louisiana?
Little Blue Herons are in Louisiana all year, but most are here in summer: numbers build from late March, peak in mid August (21% of checklists), and fall back by early October. In the quietest week (the second week of February) they are still on about 5.7% of checklists.
When do Little Blue Herons leave Louisiana?
Little Blue Herons never fully leave Louisiana: numbers fall back below half their usual rate by early October, but some are still reported in every week, about 5.7% of checklists at the low.
When is the best time to see a Little Blue Heron in Louisiana?
The Little Blue Heron is reported most often in mid August, on about 21% of Louisiana checklists.
Where in Louisiana are Little Blue Herons seen most often?
By county, Richland Parish, Red River Parish, and Acadia Parish have the highest peak reporting rates for the Little Blue Heron (counties with at least 200 checklists).