WhenToBird

Strix varia · Strigidae

When Do Barred Owls Arrive in Pennsylvania?

Adult Barred Owl
Photo: David Bird, CC0 1.0 via iNaturalist

Barred Owls reach Pennsylvania in mid January, are common by late February, peak in the second week of May (1.1% of checklists), and most are gone by mid October.

When to look

First arrivalsJan 15-21mid January
Common byFeb 22-28late February
PeakMay 8-14the second week of May
Most gone byOct 15-21mid October

Best: the second week of May. First arrivals mid January; most are gone by mid October. Peak: on about 1.1% of Pennsylvania checklists.

  1. Januncommon
  2. Febcommon
  3. Marcommon
  4. Aprpeak season
  5. Maypeak season
  6. Junpeak season
  7. Julcommon
  8. Augcommon
  9. Sepcommon
  10. Octcommon
  11. Novuncommon
  12. Deccommon

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

0%0.5%1%1.5%Jan 1-7: 0.3% of 47145 checklistsJan 8-14: 0.3% of 35840 checklistsJan 15-21: 0.3% of 35423 checklistsJan 22-31: 0.4% of 49126 checklistsFeb 1-7: 0.4% of 36366 checklistsFeb 8-14: 0.4% of 42248 checklistsFeb 15-21: 0.3% of 55888 checklistsFeb 22-28: 0.6% of 42050 checklistsMar 1-7: 0.5% of 42709 checklistsMar 8-14: 0.7% of 43985 checklistsMar 15-21: 0.6% of 44547 checklistsMar 22-31: 0.7% of 66940 checklistsApr 1-7: 0.7% of 51147 checklistsApr 8-14: 0.8% of 54868 checklistsApr 15-21: 0.9% of 57252 checklistsApr 22-30: 1.0% of 81727 checklistsMay 1-7: 1.1% of 76472 checklistsMay 8-14: 1.1% of 79341 checklistsMay 15-21: 1.0% of 61724 checklistsMay 22-31: 0.9% of 70722 checklistsJun 1-7: 0.8% of 45652 checklistsJun 8-14: 0.8% of 41810 checklistsJun 15-21: 0.8% of 38973 checklistsJun 22-30: 0.6% of 44255 checklistsJul 1-7: 0.7% of 34822 checklistsJul 8-14: 0.6% of 31104 checklistsJul 15-21: 0.5% of 29262 checklistsJul 22-31: 0.5% of 41436 checklistsAug 1-7: 0.5% of 29189 checklistsAug 8-14: 0.3% of 28840 checklistsAug 15-21: 0.4% of 29948 checklistsAug 22-31: 0.5% of 48235 checklistsSep 1-7: 0.6% of 37175 checklistsSep 8-14: 0.6% of 36527 checklistsSep 15-21: 0.7% of 37261 checklistsSep 22-30: 0.6% of 43583 checklistsOct 1-7: 0.7% of 35352 checklistsOct 8-14: 0.7% of 35560 checklistsOct 15-21: 0.6% of 33119 checklistsOct 22-31: 0.4% of 44654 checklistsNov 1-7: 0.4% of 32965 checklistsNov 8-14: 0.4% of 31305 checklistsNov 15-21: 0.3% of 29471 checklistsNov 22-30: 0.3% of 38642 checklistsDec 1-7: 0.4% of 28779 checklistsDec 8-14: 0.3% of 29486 checklistsDec 15-21: 0.5% of 37465 checklistsDec 22-31: 0.5% of 50651 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 Pennsylvania 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 Pennsylvania

Best counties

Share of checklists at the peak
  1. Warren CountyBest the second week of October · 144 checklists that week, 5,449 in all9.2%
  2. Wayne CountyBest late September · 173 checklists that week, 10,444 in all5.5%
  3. Cambria CountyBest the second week of September · 125 checklists that week, 8,530 in all4.6%
  4. Sullivan CountyBest early October · 56 checklists that week, 4,362 in all4.6%
  5. Cameron CountyBest mid September · 80 checklists that week, 5,057 in all4.6%
  6. Elk CountyBest mid December · 78 checklists that week, 6,751 in all4.5%

Best spots

Share of checklists at the peak
  1. Frick Park (northeast)Allegheny County, best the second week of June · 20 checklists that week, 483 in all48%
  2. Boyce Mayview ParkAllegheny County, best the second week of February · 25 checklists that week, 1,454 in all29%
  3. State Game Land 169Cumberland County, best late April · 46 checklists that week, 545 in all29%
  4. State Game Land 169 (Three Square Hollow Run)Cumberland County, best late April · 24 checklists that week, 386 in all28%
  5. State Game Land 169 (Peebles Run)Cumberland County, best mid April · 29 checklists that week, 462 in all24%
  6. Fishing Lake & ParkNorthampton County, best mid April · 25 checklists that week, 408 in all23%

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

Best time of day

In Pennsylvania, the Barred Owl is most often listed on checklists started between 6 and 8 pm (1.5% of those checklists).

0%0.5%1%1.5%2%12 am: too few checklists (1558) to judge1 am: too few checklists (1136) to judge2 am: too few checklists (839) to judge3 am: too few checklists (842) to judge4 am: too few checklists (2550) to judge5 am: too few checklists (18294) to judge6 am: 1.0% of 92903 checklists7 am: 0.5% of 241233 checklists8 am: 0.4% of 271994 checklists9 am: 0.3% of 236842 checklists10 am: 0.3% of 199508 checklists11 am: 0.3% of 161893 checklists12 pm: 0.3% of 143945 checklists1 pm: 0.4% of 134352 checklists2 pm: 0.5% of 129692 checklists3 pm: 0.5% of 126132 checklists4 pm: 0.7% of 115055 checklists5 pm: 1.1% of 90719 checklists6 pm: 1.4% of 67534 checklists7 pm: 1.7% of 43004 checklists8 pm: too few checklists (13966) to judge9 pm: too few checklists (3913) to judge10 pm: too few checklists (1989) to judge11 pm: too few checklists (1146) 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
January0.3%0.3%0.3%0.4%
February0.4%0.4%0.3%0.6%
March0.5%0.7%0.6%0.7%
April0.7%0.8%0.9%1.0%
May1.1%1.1%1.0%0.9%
June0.8%0.8%0.8%0.6%
July0.7%0.6%0.5%0.5%
August0.5%0.3%0.4%0.5%
September0.6%0.6%0.7%0.6%
October0.7%0.7%0.6%0.4%
November0.4%0.4%0.3%0.3%
December0.4%0.3%0.5%0.5%

Neighboring states

  • Maryland: arrives the second week of December, 5 weeks earlier than Pennsylvania
  • District of Columbia: arrives mid January, in the same week than Pennsylvania
  • Delaware: arrives mid January, in the same week than Pennsylvania
  • New York: arrives late January, 1 week later than Pennsylvania

Common questions

When do Barred Owls arrive in Pennsylvania?
Barred Owls reach Pennsylvania in mid January, are common by late February, peak in the second week of May (1.1% of checklists), and most are gone by mid October.
When do Barred Owls leave Pennsylvania?
Most Barred Owls have left Pennsylvania by mid October, when reports fall below half their usual rate. Stragglers are still reported until early November.
When is the best time to see a Barred Owl in Pennsylvania?
The Barred Owl is reported most often in the second week of May, on about 1.1% of Pennsylvania checklists.
Where in Pennsylvania are Barred Owls seen most often?
By county, Warren County, Wayne County, and Cambria County have the highest peak reporting rates for the Barred Owl (counties with at least 200 checklists).