WhenToBird

Sitta canadensis · Sittidae

When Do Red-breasted Nuthatches Arrive in Pennsylvania?

Adult Red-breasted Nuthatch
Photo: Joshua Liverman, CC BY 4.0 via iNaturalist

Red-breasted Nuthatches reach Pennsylvania in mid August, are common by late August, peak in late September (6.0% of checklists), and most are gone by the second week of May.

When to look

First arrivalsAug 15-21mid August
Common byAug 22-31late August
PeakSep 22-30late September
Most gone byMay 8-14the second week of May

Best: late September. First arrivals mid August; most are gone by the second week of May. Peak: on about 6.0% of Pennsylvania checklists.

  1. Jancommon
  2. Febcommon
  3. Maruncommon
  4. Apruncommon
  5. Mayuncommon
  6. Junrare
  7. Julrare
  8. Augcommon
  9. Seppeak season
  10. Octpeak season
  11. Novpeak season
  12. Decpeak season

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

0%2%4%6%8%Jan 1-7: 3.1% of 47145 checklistsJan 8-14: 3.1% of 35840 checklistsJan 15-21: 2.9% of 35423 checklistsJan 22-31: 2.9% of 49126 checklistsFeb 1-7: 2.9% of 36366 checklistsFeb 8-14: 3.1% of 42248 checklistsFeb 15-21: 2.6% of 55888 checklistsFeb 22-28: 2.2% of 42050 checklistsMar 1-7: 2.2% of 42709 checklistsMar 8-14: 2.0% of 43985 checklistsMar 15-21: 2.1% of 44547 checklistsMar 22-31: 1.8% of 66940 checklistsApr 1-7: 1.9% of 51147 checklistsApr 8-14: 1.8% of 54868 checklistsApr 15-21: 2.0% of 57252 checklistsApr 22-30: 2.4% of 81727 checklistsMay 1-7: 2.4% of 76472 checklistsMay 8-14: 1.9% of 79341 checklistsMay 15-21: 0.9% of 61724 checklistsMay 22-31: 0.5% of 70722 checklistsJun 1-7: 0.4% of 45652 checklistsJun 8-14: 0.4% of 41810 checklistsJun 15-21: 0.6% of 38973 checklistsJun 22-30: 0.6% of 44255 checklistsJul 1-7: 0.8% of 34822 checklistsJul 8-14: 0.7% of 31104 checklistsJul 15-21: 0.5% of 29262 checklistsJul 22-31: 0.5% of 41436 checklistsAug 1-7: 0.4% of 29189 checklistsAug 8-14: 0.6% of 28840 checklistsAug 15-21: 0.8% of 29948 checklistsAug 22-31: 2.2% of 48235 checklistsSep 1-7: 4.2% of 37175 checklistsSep 8-14: 5.3% of 36527 checklistsSep 15-21: 6.3% of 37261 checklistsSep 22-30: 5.8% of 43583 checklistsOct 1-7: 6.1% of 35352 checklistsOct 8-14: 5.8% of 35560 checklistsOct 15-21: 6.1% of 33119 checklistsOct 22-31: 5.4% of 44654 checklistsNov 1-7: 5.4% of 32965 checklistsNov 8-14: 4.8% of 31305 checklistsNov 15-21: 5.1% of 29471 checklistsNov 22-30: 4.9% of 38642 checklistsDec 1-7: 4.8% of 28779 checklistsDec 8-14: 4.5% of 29486 checklistsDec 15-21: 4.2% of 37465 checklistsDec 22-31: 4.0% 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. Jefferson CountyBest late November · 101 checklists that week, 5,956 in all28%
  2. Forest CountyBest mid October · 65 checklists that week, 5,388 in all26%
  3. Clarion CountyBest mid November · 86 checklists that week, 9,153 in all24%
  4. Union CountyBest the second week of November · 54 checklists that week, 7,238 in all21%
  5. Elk CountyBest the second week of November · 103 checklists that week, 6,751 in all20%
  6. Warren CountyBest late November · 44 checklists that week, 5,449 in all19%

Best spots

Share of checklists at the peak
  1. Owl Creek Recreation AreaSchuylkill County, best late December · 40 checklists that week, 373 in all84%
  2. Michaux State ForestCumberland County, best mid March · 27 checklists that week, 339 in all81%
  3. Lower LakeMonroe County, best mid April · 27 checklists that week, 1,218 in all72%
  4. Nottingham County ParkChester County, best late February · 74 checklists that week, 356 in all67%
  5. Niagara PondErie County, best the second week of September · 29 checklists that week, 1,155 in all65%
  6. Pine Grove Furnace State ParkCumberland County, best late November · 24 checklists that week, 725 in all63%

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

Best time of day

In Pennsylvania, the Red-breasted Nuthatch is most often listed on checklists started between 7 and 9 am (3.9% of those checklists).

0%2%4%6%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: 3.1% of 92903 checklists7 am: 4.0% of 241233 checklists8 am: 3.8% of 271994 checklists9 am: 3.2% of 236842 checklists10 am: 2.8% of 199508 checklists11 am: 2.5% of 161893 checklists12 pm: 2.5% of 143945 checklists1 pm: 2.4% of 134352 checklists2 pm: 2.2% of 129692 checklists3 pm: 2.0% of 126132 checklists4 pm: 1.5% of 115055 checklists5 pm: 1.3% of 90719 checklists6 pm: 0.8% of 67534 checklists7 pm: 0.3% 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
January3.1%3.1%2.9%2.9%
February2.9%3.1%2.6%2.2%
March2.2%2.0%2.1%1.8%
April1.9%1.8%2.0%2.4%
May2.4%1.9%0.9%0.5%
June0.4%0.4%0.6%0.6%
July0.8%0.7%0.5%0.5%
August0.4%0.6%0.8%2.2%
September4.2%5.3%6.3%5.8%
October6.1%5.8%6.1%5.4%
November5.4%4.8%5.1%4.9%
December4.8%4.5%4.2%4.0%

Neighboring states

  • Maryland: arrives late August, 1 week later than Pennsylvania
  • District of Columbia: arrives early September, 2 weeks later than Pennsylvania
  • Delaware: arrives early September, 2 weeks later than Pennsylvania
  • New Jersey: arrives mid August, in the same week than Pennsylvania

Common questions

When do Red-breasted Nuthatches arrive in Pennsylvania?
Red-breasted Nuthatches reach Pennsylvania in mid August, are common by late August, peak in late September (6.0% of checklists), and most are gone by the second week of May.
When do Red-breasted Nuthatches leave Pennsylvania?
Most Red-breasted Nuthatches have left Pennsylvania by the second week of May, when reports fall below half their usual rate. Stragglers are still reported until mid May.
When is the best time to see a Red-breasted Nuthatch in Pennsylvania?
The Red-breasted Nuthatch is reported most often in late September, on about 6.0% of Pennsylvania checklists.
Where in Pennsylvania are Red-breasted Nuthatches seen most often?
By county, Jefferson County, Forest County, and Clarion County have the highest peak reporting rates for the Red-breasted Nuthatch (counties with at least 200 checklists).