WhenToBird

Pandion haliaetus · Pandionidae

When Do Ospreys Arrive in Arkansas?

Adult female Osprey
Photo: Bill Levine, CC BY 4.0 via iNaturalist

Ospreys arrive in Arkansas in early August, peak in late September (3.2% of checklists), and most are gone by early November.

When to look

First arrivalsAug 1-7early August
Common byAug 1-7early August
PeakSep 22-30late September
Most gone byNov 1-7early November

Best: late September. First arrivals early August; most are gone by early November. Peak: on about 3.2% of Arkansas checklists.

  1. Jannot usually seen
  2. Febnot usually seen
  3. Marcommon
  4. Aprpeak season
  5. Maycommon
  6. Jununcommon
  7. Juluncommon
  8. Augcommon
  9. Seppeak season
  10. Octpeak season
  11. Novuncommon
  12. Decnot usually seen

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

0%1%2%3%4%Jan 1-7: 0.1% of 5292 checklistsJan 8-14: 0.1% of 4085 checklistsJan 15-21: 0.1% of 4531 checklistsJan 22-31: 0.1% of 6500 checklistsFeb 1-7: 0.1% of 4752 checklistsFeb 8-14: 0% of 5385 checklistsFeb 15-21: 0.1% of 7219 checklistsFeb 22-28: 0.1% of 4163 checklistsMar 1-7: 0.2% of 3952 checklistsMar 8-14: 0.4% of 4067 checklistsMar 15-21: 0.8% of 4446 checklistsMar 22-31: 1.5% of 6911 checklistsApr 1-7: 2.8% of 5422 checklistsApr 8-14: 3.1% of 6043 checklistsApr 15-21: 3.0% of 6759 checklistsApr 22-30: 2.6% of 10236 checklistsMay 1-7: 1.3% of 8243 checklistsMay 8-14: 1.0% of 7467 checklistsMay 15-21: 0.8% of 6160 checklistsMay 22-31: 0.5% of 7287 checklistsJun 1-7: 0.3% of 4884 checklistsJun 8-14: 0.4% of 4444 checklistsJun 15-21: 0.3% of 3579 checklistsJun 22-30: 0.8% of 3858 checklistsJul 1-7: 0.5% of 3042 checklistsJul 8-14: 0.6% of 2889 checklistsJul 15-21: 0.4% of 2599 checklistsJul 22-31: 0.4% of 3825 checklistsAug 1-7: 0.6% of 2951 checklistsAug 8-14: 1.2% of 2765 checklistsAug 15-21: 1.1% of 2838 checklistsAug 22-31: 1.6% of 4360 checklistsSep 1-7: 2.1% of 3573 checklistsSep 8-14: 2.6% of 3314 checklistsSep 15-21: 2.8% of 3118 checklistsSep 22-30: 3.7% of 4381 checklistsOct 1-7: 2.9% of 3640 checklistsOct 8-14: 2.2% of 4119 checklistsOct 15-21: 1.9% of 3810 checklistsOct 22-31: 1.1% of 4956 checklistsNov 1-7: 0.6% of 3704 checklistsNov 8-14: 0.4% of 3678 checklistsNov 15-21: 0.2% of 3457 checklistsNov 22-30: 0.2% of 4648 checklistsDec 1-7: 0.1% of 3390 checklistsDec 8-14: 0.1% of 3510 checklistsDec 15-21: 0.1% of 4540 checklistsDec 22-31: 0.1% of 6404 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 Arkansas 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 Arkansas

Best counties

Share of checklists at the peak
  1. Yell CountyBest the second week of July · 12 checklists that week, 2,585 in all30%
  2. Desha CountyBest mid September · 14 checklists that week, 756 in all28%
  3. Howard CountyBest the second week of July · 15 checklists that week, 238 in all27%
  4. Little River CountyBest mid March · 10 checklists that week, 510 in all17%
  5. Boone CountyBest the second week of September · 30 checklists that week, 1,653 in all16%
  6. Johnson CountyBest the second week of October · 75 checklists that week, 1,679 in all14%

Best spots

Share of checklists at the peak
  1. Lake Fayetteville ParkWashington County, best mid April · 51 checklists that week, 1,197 in all48%
  2. Bell Slough (northeast)Faulkner County, best early May · 30 checklists that week, 188 in all36%
  3. Siloam Springs LakeBenton County, best the second week of October · 21 checklists that week, 678 in all33%
  4. Lake Fayetteville Park (east)Washington County, best late March · 20 checklists that week, 469 in all31%

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

Best time of day

In Arkansas, the Osprey is most often listed on checklists started between 4 and 6 pm (1.2% of those checklists).

0%0.5%1%1.5%12 am: too few checklists (98) to judge1 am: too few checklists (88) to judge2 am: too few checklists (95) to judge3 am: too few checklists (94) to judge4 am: too few checklists (145) to judge5 am: too few checklists (1455) to judge6 am: 1.2% of 10807 checklists7 am: 1.0% of 27761 checklists8 am: 1.1% of 30943 checklists9 am: 1.2% of 26975 checklists10 am: 1.0% of 21989 checklists11 am: 0.9% of 16828 checklists12 pm: 0.9% of 14069 checklists1 pm: 0.9% of 13145 checklists2 pm: 1.0% of 12780 checklists3 pm: 1.1% of 12723 checklists4 pm: 1.2% of 12500 checklists5 pm: 1.2% of 9576 checklists6 pm: 1.1% of 7182 checklists7 pm: too few checklists (4187) to judge8 pm: too few checklists (1314) to judge9 pm: too few checklists (245) to judge10 pm: too few checklists (122) to judge11 pm: too few checklists (75) 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
January0.1%0.1%0.1%0.1%
February0.1%0%0.1%0.1%
March0.2%0.4%0.8%1.5%
April2.8%3.1%3.0%2.6%
May1.3%1.0%0.8%0.5%
June0.3%0.4%0.3%0.8%
July0.5%0.6%0.4%0.4%
August0.6%1.2%1.1%1.6%
September2.1%2.6%2.8%3.7%
October2.9%2.2%1.9%1.1%
November0.6%0.4%0.2%0.2%
December0.1%0.1%0.1%0.1%

Neighboring states

  • Missouri: arrives mid July, 2 weeks earlier than Arkansas
  • Oklahoma: arrives mid August, 2 weeks later than Arkansas
  • Kansas: arrives mid August, 2 weeks later than Arkansas
  • Mississippi: year-round, peaks mid March

Common questions

When do Ospreys arrive in Arkansas?
Ospreys arrive in Arkansas in early August, peak in late September (3.2% of checklists), and most are gone by early November.
When do Ospreys leave Arkansas?
Most Ospreys have left Arkansas by early November, when reports fall below half their usual rate.
When is the best time to see a Osprey in Arkansas?
The Osprey is reported most often in late September, on about 3.2% of Arkansas checklists.
Where in Arkansas are Ospreys seen most often?
By county, Yell County, Desha County, and Howard County have the highest peak reporting rates for the Osprey (counties with at least 200 checklists).