WhenToBird

Sitta carolinensis · Sittidae

When Do White-breasted Nuthatches Arrive in Pennsylvania?

Adult White-breasted Nuthatch
Photo: S Boisvert, CC BY 4.0 via iNaturalist

The White-breasted Nuthatch is in Pennsylvania all year. It turns up on about 43% of checklists at its peak (late September) and on 19% in its quietest week (early June).

When to look

PresentAll year
Peak weekSep 22-30late September
Quietest weekJun 1-7early June

Best: late September. Here all year. Peak: on about 43% of Pennsylvania checklists.

  1. Janpeak season
  2. Febpeak season
  3. Marcommon
  4. Aprcommon
  5. Maycommon
  6. Juncommon
  7. Julcommon
  8. Augpeak season
  9. Seppeak season
  10. Octpeak season
  11. Novpeak season
  12. Decpeak season

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

0%20%40%60%Jan 1-7: 37% of 47145 checklistsJan 8-14: 36% of 35840 checklistsJan 15-21: 35% of 35423 checklistsJan 22-31: 34% of 49126 checklistsFeb 1-7: 34% of 36366 checklistsFeb 8-14: 36% of 42248 checklistsFeb 15-21: 35% of 55888 checklistsFeb 22-28: 31% of 42050 checklistsMar 1-7: 29% of 42709 checklistsMar 8-14: 29% of 43985 checklistsMar 15-21: 30% of 44547 checklistsMar 22-31: 28% of 66940 checklistsApr 1-7: 28% of 51147 checklistsApr 8-14: 27% of 54868 checklistsApr 15-21: 27% of 57252 checklistsApr 22-30: 27% of 81727 checklistsMay 1-7: 26% of 76472 checklistsMay 8-14: 25% of 79341 checklistsMay 15-21: 22% of 61724 checklistsMay 22-31: 19% of 70722 checklistsJun 1-7: 19% of 45652 checklistsJun 8-14: 20% of 41810 checklistsJun 15-21: 23% of 38973 checklistsJun 22-30: 26% of 44255 checklistsJul 1-7: 27% of 34822 checklistsJul 8-14: 25% of 31104 checklistsJul 15-21: 25% of 29262 checklistsJul 22-31: 25% of 41436 checklistsAug 1-7: 26% of 29189 checklistsAug 8-14: 27% of 28840 checklistsAug 15-21: 30% of 29948 checklistsAug 22-31: 34% of 48235 checklistsSep 1-7: 39% of 37175 checklistsSep 8-14: 41% of 36527 checklistsSep 15-21: 43% of 37261 checklistsSep 22-30: 41% of 43583 checklistsOct 1-7: 43% of 35352 checklistsOct 8-14: 42% of 35560 checklistsOct 15-21: 42% of 33119 checklistsOct 22-31: 42% of 44654 checklistsNov 1-7: 42% of 32965 checklistsNov 8-14: 41% of 31305 checklistsNov 15-21: 41% of 29471 checklistsNov 22-30: 41% of 38642 checklistsDec 1-7: 40% of 28779 checklistsDec 8-14: 40% of 29486 checklistsDec 15-21: 39% of 37465 checklistsDec 22-31: 40% 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. Juniata CountyBest the second week of November · 94 checklists that week, 9,807 in all78%
  2. Jefferson CountyBest mid December · 71 checklists that week, 5,956 in all70%
  3. Bedford CountyBest late November · 171 checklists that week, 11,483 in all70%
  4. Warren CountyBest mid September · 57 checklists that week, 5,449 in all64%
  5. Forest CountyBest the second week of September · 182 checklists that week, 5,388 in all63%
  6. Greene CountyBest late October · 30 checklists that week, 2,997 in all63%

Best spots

Share of checklists at the peak
  1. Woodland LakeMonroe County, best late March · 21 checklists that week, 725 in all100%
  2. Blue Spruce ParkIndiana County, best late September · 33 checklists that week, 667 in all96%
  3. Hawk Mountain Sanctuary (Cobble)Berks County, best late January · 32 checklists that week, 1,224 in all96%
  4. Lower LakeMonroe County, best early March · 28 checklists that week, 1,218 in all92%
  5. Walnut Springs ParkCentre County, best late December · 21 checklists that week, 303 in all92%
  6. Owls Nest ParkBucks County, best the second week of September · 21 checklists that week, 708 in all92%

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

Best time of day

In Pennsylvania, the White-breasted Nuthatch is most often listed on checklists started between 7 and 9 am (42% of those checklists).

0%20%40%60%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: 38% of 92903 checklists7 am: 43% of 241233 checklists8 am: 40% of 271994 checklists9 am: 35% of 236842 checklists10 am: 31% of 199508 checklists11 am: 29% of 161893 checklists12 pm: 28% of 143945 checklists1 pm: 29% of 134352 checklists2 pm: 28% of 129692 checklists3 pm: 28% of 126132 checklists4 pm: 24% of 115055 checklists5 pm: 23% of 90719 checklists6 pm: 19% of 67534 checklists7 pm: 11% 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
January37%36%35%34%
February34%36%35%31%
March29%29%30%28%
April28%27%27%27%
May26%25%22%19%
June19%20%23%26%
July27%25%25%25%
August26%27%30%34%
September39%41%43%41%
October43%42%42%42%
November42%41%41%41%
December40%40%39%40%

Neighboring states

  • Maryland: year-round, peaks the second week of September
  • District of Columbia: all year, most in fall, peaks the second week of September
  • Delaware: all year, most in fall, peaks the second week of September
  • New Jersey: year-round, peaks early December

Common questions

When do White-breasted Nuthatches arrive in Pennsylvania?
The White-breasted Nuthatch is in Pennsylvania all year. It turns up on about 43% of checklists at its peak (late September) and on 19% in its quietest week (early June).
When do White-breasted Nuthatches leave Pennsylvania?
The White-breasted Nuthatch does not leave Pennsylvania: it is reported all year, from 19% of checklists in early June to 43% in late September.
When is the best time to see a White-breasted Nuthatch in Pennsylvania?
The White-breasted Nuthatch is reported most often in late September, on about 43% of Pennsylvania checklists.
Where in Pennsylvania are White-breasted Nuthatches seen most often?
By county, Juniata County, Jefferson County, and Bedford County have the highest peak reporting rates for the White-breasted Nuthatch (counties with at least 200 checklists).