WhenToBird

Ardea herodias · Ardeidae

When Do Great Blue Herons Arrive in Indiana?

Adult Great Blue Heron
Photo: mostbittern, CC BY 4.0 via iNaturalist

The Great Blue Heron is in Indiana all year. It turns up on about 31% of checklists at its peak (mid August) and on 6.4% in its quietest week (the second week of February).

When to look

PresentAll year
Peak weekAug 15-21mid August
Quietest weekFeb 8-14the second week of February

Best: mid August. Here all year. Peak: on about 31% of Indiana checklists.

  1. Januncommon
  2. Febuncommon
  3. Marcommon
  4. Aprpeak season
  5. Maypeak season
  6. Junpeak season
  7. Julpeak season
  8. Augpeak season
  9. Seppeak season
  10. Octpeak season
  11. Novcommon
  12. Deccommon

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

0%10%20%30%40%Jan 1-7: 10% of 18123 checklistsJan 8-14: 9.3% of 12006 checklistsJan 15-21: 8.1% of 12403 checklistsJan 22-31: 9.0% of 16181 checklistsFeb 1-7: 8.1% of 12546 checklistsFeb 8-14: 6.1% of 14250 checklistsFeb 15-21: 5.5% of 18077 checklistsFeb 22-28: 8.1% of 13590 checklistsMar 1-7: 9.2% of 14545 checklistsMar 8-14: 12% of 14594 checklistsMar 15-21: 15% of 13894 checklistsMar 22-31: 20% of 22400 checklistsApr 1-7: 21% of 18069 checklistsApr 8-14: 22% of 19579 checklistsApr 15-21: 25% of 19518 checklistsApr 22-30: 25% of 30544 checklistsMay 1-7: 24% of 28430 checklistsMay 8-14: 24% of 30624 checklistsMay 15-21: 25% of 22920 checklistsMay 22-31: 27% of 21234 checklistsJun 1-7: 24% of 12279 checklistsJun 8-14: 24% of 10904 checklistsJun 15-21: 24% of 9488 checklistsJun 22-30: 24% of 11362 checklistsJul 1-7: 25% of 9947 checklistsJul 8-14: 28% of 9585 checklistsJul 15-21: 27% of 8929 checklistsJul 22-31: 28% of 12639 checklistsAug 1-7: 29% of 9528 checklistsAug 8-14: 32% of 9451 checklistsAug 15-21: 32% of 9442 checklistsAug 22-31: 30% of 14969 checklistsSep 1-7: 31% of 12628 checklistsSep 8-14: 30% of 11793 checklistsSep 15-21: 29% of 11396 checklistsSep 22-30: 29% of 14203 checklistsOct 1-7: 27% of 11365 checklistsOct 8-14: 25% of 12092 checklistsOct 15-21: 25% of 10440 checklistsOct 22-31: 23% of 13883 checklistsNov 1-7: 21% of 10476 checklistsNov 8-14: 18% of 9776 checklistsNov 15-21: 18% of 9035 checklistsNov 22-30: 16% of 12547 checklistsDec 1-7: 14% of 9078 checklistsDec 8-14: 13% of 8732 checklistsDec 15-21: 13% of 11024 checklistsDec 22-31: 11% 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. Union CountyBest mid September · 101 checklists that week, 4,811 in all78%
  2. Benton CountyBest late August · 40 checklists that week, 993 in all76%
  3. Dearborn CountyBest late August · 67 checklists that week, 2,838 in all75%
  4. Adams CountyBest early June · 28 checklists that week, 1,306 in all70%
  5. Gibson CountyBest mid August · 262 checklists that week, 10,754 in all67%
  6. Greene CountyBest mid August · 283 checklists that week, 17,518 in all65%

Best spots

Share of checklists at the peak
  1. Brookville Recreation AreaUnion County, best mid July · 28 checklists that week, 1,086 in all100%
  2. Eagle Creek Park (north)Marion County, best mid August · 28 checklists that week, 277 in all99%
  3. Stribel ParkLaPorte County, best late August · 43 checklists that week, 578 in all99%
  4. Vaughn HollowBrown County, best early October · 25 checklists that week, 919 in all99%
  5. Muncie Nature PreserveDelaware County, best early May · 22 checklists that week, 125 in all98%

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

Best time of day

In Indiana, the Great Blue Heron is most often listed on checklists started between 6 and 8 am (27% of those checklists).

0%10%20%30%40%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: 33% of 20589 checklists7 am: 25% of 58470 checklists8 am: 23% of 86931 checklists9 am: 21% of 78239 checklists10 am: 19% of 66080 checklists11 am: 18% of 54904 checklists12 pm: 17% of 47610 checklists1 pm: 17% of 44814 checklists2 pm: 18% of 43790 checklists3 pm: 19% of 42983 checklists4 pm: 19% of 45349 checklists5 pm: 20% of 35993 checklists6 pm: 22% of 26447 checklists7 pm: 21% 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
January10%9.3%8.1%9.0%
February8.1%6.1%5.5%8.1%
March9.2%12%15%20%
April21%22%25%25%
May24%24%25%27%
June24%24%24%24%
July25%28%27%28%
August29%32%32%30%
September31%30%29%29%
October27%25%25%23%
November21%18%18%16%
December14%13%13%11%

Neighboring states

  • Illinois: all year, most in summer, peaks the second week of August
  • Kentucky: year-round, peaks late August
  • Ohio: all year, most in summer, peaks mid August
  • Michigan: all year, most in summer, peaks mid August

Common questions

When do Great Blue Herons arrive in Indiana?
The Great Blue Heron is in Indiana all year. It turns up on about 31% of checklists at its peak (mid August) and on 6.4% in its quietest week (the second week of February).
When do Great Blue Herons leave Indiana?
The Great Blue Heron does not leave Indiana: it is reported all year, from 6.4% of checklists in the second week of February to 31% in mid August.
When is the best time to see a Great Blue Heron in Indiana?
The Great Blue Heron is reported most often in mid August, on about 31% of Indiana checklists.
Where in Indiana are Great Blue Herons seen most often?
By county, Union County, Benton County, and Dearborn County have the highest peak reporting rates for the Great Blue Heron (counties with at least 200 checklists).