WhenToBird

Toxostoma rufum · Mimidae

When Do Brown Thrashers Arrive in Oklahoma?

Adult Brown Thrasher
Photo: northerly, CC BY 4.0 via iNaturalist

Brown Thrashers reach Oklahoma in the second week of March, are common by late March, peak in early May (15% of checklists), and most are gone by the second week of October.

When to look

First arrivalsMar 8-14the second week of March
Common byMar 22-31late March
PeakMay 1-7early May
Most gone byOct 8-14the second week of October

Best: early May. First arrivals the second week of March; most are gone by the second week of October. Peak: on about 15% of Oklahoma checklists.

  1. Janrare
  2. Febrare
  3. Marcommon
  4. Aprpeak season
  5. Maypeak season
  6. Junpeak season
  7. Julpeak season
  8. Auguncommon
  9. Seppeak season
  10. Octcommon
  11. Novuncommon
  12. Decuncommon

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

0%5%10%15%20%Jan 1-7: 1.5% of 6087 checklistsJan 8-14: 1.8% of 4350 checklistsJan 15-21: 2.0% of 4381 checklistsJan 22-31: 2.0% of 6165 checklistsFeb 1-7: 2.0% of 4259 checklistsFeb 8-14: 1.7% of 4589 checklistsFeb 15-21: 1.8% of 7001 checklistsFeb 22-28: 1.9% of 4482 checklistsMar 1-7: 2.5% of 4724 checklistsMar 8-14: 2.3% of 4571 checklistsMar 15-21: 3.2% of 4393 checklistsMar 22-31: 7.3% of 7544 checklistsApr 1-7: 12% of 5967 checklistsApr 8-14: 13% of 6543 checklistsApr 15-21: 13% of 7366 checklistsApr 22-30: 15% of 10618 checklistsMay 1-7: 16% of 8835 checklistsMay 8-14: 14% of 8247 checklistsMay 15-21: 14% of 6081 checklistsMay 22-31: 13% of 7283 checklistsJun 1-7: 13% of 4256 checklistsJun 8-14: 14% of 3774 checklistsJun 15-21: 14% of 3541 checklistsJun 22-30: 12% of 4159 checklistsJul 1-7: 12% of 3209 checklistsJul 8-14: 11% of 2916 checklistsJul 15-21: 8.6% of 2861 checklistsJul 22-31: 6.8% of 4146 checklistsAug 1-7: 5.7% of 3043 checklistsAug 8-14: 4.7% of 2839 checklistsAug 15-21: 4.3% of 3014 checklistsAug 22-31: 5.0% of 4759 checklistsSep 1-7: 5.7% of 3861 checklistsSep 8-14: 7.6% of 3748 checklistsSep 15-21: 9.7% of 3569 checklistsSep 22-30: 15% of 4830 checklistsOct 1-7: 11% of 3809 checklistsOct 8-14: 6.4% of 4142 checklistsOct 15-21: 5.0% of 3705 checklistsOct 22-31: 3.0% of 4738 checklistsNov 1-7: 2.1% of 3823 checklistsNov 8-14: 2.0% of 3849 checklistsNov 15-21: 2.4% of 3722 checklistsNov 22-30: 2.2% of 4795 checklistsDec 1-7: 2.2% of 3324 checklistsDec 8-14: 3.1% of 3574 checklistsDec 15-21: 2.8% of 3884 checklistsDec 22-31: 1.8% of 5774 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 Oklahoma 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 Oklahoma

Best counties

Share of checklists at the peak
  1. Adair CountyBest early April · 15 checklists that week, 616 in all42%
  2. Bryan CountyBest early October · 20 checklists that week, 1,517 in all39%
  3. Pushmataha CountyBest early October · 10 checklists that week, 361 in all37%
  4. Stephens CountyBest mid April · 32 checklists that week, 945 in all35%
  5. Custer CountyBest late June · 67 checklists that week, 2,696 in all34%
  6. Garfield CountyBest early June · 58 checklists that week, 3,534 in all32%

Best spots

Share of checklists at the peak
  1. Woodward ParkTulsa County, best the second week of May · 48 checklists that week, 458 in all86%
  2. Boomer Lake Park (Hazen Lake)Payne County, best early June · 22 checklists that week, 597 in all76%
  3. TulsaTulsa County, best the second week of May · 42 checklists that week, 1,288 in all73%
  4. Sanborn Lake ParkPayne County, best mid September · 31 checklists that week, 992 in all69%
  5. Boomer Lake ParkPayne County, best the second week of June · 60 checklists that week, 3,723 in all56%
  6. Stars & Stripes ParkOklahoma County, best mid May · 23 checklists that week, 1,039 in all55%

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

Best time of day

In Oklahoma, the Brown Thrasher is most often listed on checklists started between 6 and 8 am (14% of those checklists).

0%5%10%15%20%12 am: too few checklists (91) to judge1 am: too few checklists (65) to judge2 am: too few checklists (73) to judge3 am: too few checklists (73) to judge4 am: too few checklists (100) to judge5 am: too few checklists (647) to judge6 am: 17% of 8353 checklists7 am: 12% of 24509 checklists8 am: 9.3% of 27848 checklists9 am: 7.8% of 25316 checklists10 am: 6.7% of 21161 checklists11 am: 6.1% of 18730 checklists12 pm: 5.5% of 16097 checklists1 pm: 4.5% of 14028 checklists2 pm: 4.3% of 13599 checklists3 pm: 4.3% of 14228 checklists4 pm: 4.7% of 14597 checklists5 pm: 5.8% of 12125 checklists6 pm: 8.3% of 9337 checklists7 pm: 9.8% of 6944 checklists8 pm: too few checklists (2403) to judge9 pm: too few checklists (459) to judge10 pm: too few checklists (226) to judge11 pm: too few checklists (141) 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
January1.5%1.8%2.0%2.0%
February2.0%1.7%1.8%1.9%
March2.5%2.3%3.2%7.3%
April12%13%13%15%
May16%14%14%13%
June13%14%14%12%
July12%11%8.6%6.8%
August5.7%4.7%4.3%5.0%
September5.7%7.6%9.7%15%
October11%6.4%5.0%3.0%
November2.1%2.0%2.4%2.2%
December2.2%3.1%2.8%1.8%

Neighboring states

  • Kansas: arrives mid March, 1 week later than Oklahoma
  • Arkansas: arrives mid March, 1 week later than Oklahoma
  • Missouri: arrives the second week of March, in the same week than Oklahoma
  • Nebraska: arrives the second week of April, 4 weeks later than Oklahoma

Common questions

When do Brown Thrashers arrive in Oklahoma?
Brown Thrashers reach Oklahoma in the second week of March, are common by late March, peak in early May (15% of checklists), and most are gone by the second week of October.
When do Brown Thrashers leave Oklahoma?
Most Brown Thrashers have left Oklahoma by the second week of October, when reports fall below half their usual rate. Stragglers are still reported until late October.
When is the best time to see a Brown Thrasher in Oklahoma?
The Brown Thrasher is reported most often in early May, on about 15% of Oklahoma checklists.
Where in Oklahoma are Brown Thrashers seen most often?
By county, Adair County, Bryan County, and Pushmataha County have the highest peak reporting rates for the Brown Thrasher (counties with at least 200 checklists).