WhenToBird

Aythya americana · Anatidae

When Do Redheads Arrive in Pennsylvania?

Adult female Redhead
Photo: sophia_herrmeyer, CC BY 4.0 via iNaturalist

Redheads are winter birds in Pennsylvania: they arrive in early January, peak in early March (3.7% of checklists), and most are gone by late March.

When to look

First arrivalsJan 1-7early January
Common byJan 1-7early January
PeakMar 1-7early March
Most gone byMar 22-31late March

Best: early March. First arrivals early January; most are gone by late March. Peak: on about 3.7% of Pennsylvania checklists.

  1. Jancommon
  2. Febpeak season
  3. Marpeak season
  4. Apruncommon
  5. Maynot usually seen
  6. Junnot usually seen
  7. Julnot usually seen
  8. Augnot usually seen
  9. Sepnot usually seen
  10. Octrare
  11. Novuncommon
  12. Decuncommon

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

0%2%4%6%Jan 1-7: 1.2% of 47145 checklistsJan 8-14: 1.2% of 35840 checklistsJan 15-21: 1.8% of 35423 checklistsJan 22-31: 2.2% of 49126 checklistsFeb 1-7: 2.7% of 36366 checklistsFeb 8-14: 2.3% of 42248 checklistsFeb 15-21: 2.0% of 55888 checklistsFeb 22-28: 3.6% of 42050 checklistsMar 1-7: 4.2% of 42709 checklistsMar 8-14: 3.5% of 43985 checklistsMar 15-21: 2.3% of 44547 checklistsMar 22-31: 1.4% of 66940 checklistsApr 1-7: 0.8% of 51147 checklistsApr 8-14: 0.3% of 54868 checklistsApr 15-21: 0.2% of 57252 checklistsApr 22-30: 0.1% of 81727 checklistsMay 1-7: 0.1% of 76472 checklistsMay 8-14: 0.1% of 79341 checklistsMay 15-21: 0.1% of 61724 checklistsMay 22-31: 0.1% of 70722 checklistsJun 1-7: 0.1% of 45652 checklistsJun 8-14: 0.1% of 41810 checklistsJun 15-21: 0.1% of 38973 checklistsJun 22-30: 0.1% of 44255 checklistsJul 1-7: 0.1% of 34822 checklistsJul 8-14: 0.1% of 31104 checklistsJul 15-21: 0.1% of 29262 checklistsJul 22-31: 0.1% of 41436 checklistsAug 1-7: 0.1% of 29189 checklistsAug 8-14: 0.3% of 28840 checklistsAug 15-21: 0.1% of 29948 checklistsAug 22-31: 0.1% of 48235 checklistsSep 1-7: 0.1% of 37175 checklistsSep 8-14: 0.1% of 36527 checklistsSep 15-21: 0.1% of 37261 checklistsSep 22-30: 0.1% of 43583 checklistsOct 1-7: 0.1% of 35352 checklistsOct 8-14: 0.1% of 35560 checklistsOct 15-21: 0.1% of 33119 checklistsOct 22-31: 0.2% of 44654 checklistsNov 1-7: 0.3% of 32965 checklistsNov 8-14: 0.4% of 31305 checklistsNov 15-21: 0.5% of 29471 checklistsNov 22-30: 0.5% of 38642 checklistsDec 1-7: 0.8% of 28779 checklistsDec 8-14: 0.7% of 29486 checklistsDec 15-21: 0.6% of 37465 checklistsDec 22-31: 1.1% 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. Crawford CountyBest early March · 606 checklists that week, 23,552 in all22%
  2. Erie CountyBest early March · 924 checklists that week, 49,012 in all16%
  3. Mercer CountyBest the second week of March · 456 checklists that week, 17,853 in all14%
  4. Greene CountyBest late January · 43 checklists that week, 2,997 in all13%
  5. Carbon CountyBest late January · 443 checklists that week, 16,269 in all13%
  6. Indiana CountyBest the second week of March · 315 checklists that week, 20,768 in all11%

Best spots

Share of checklists at the peak
  1. Ice House ParkCrawford County, best early March · 35 checklists that week, 379 in all94%
  2. Weatherstone Open SpaceChester County, best late February · 21 checklists that week, 725 in all84%
  3. Childrens LakeCumberland County, best early February · 57 checklists that week, 1,655 in all76%
  4. Niagara Pond (Gull Point)Erie County, best early March · 32 checklists that week, 521 in all74%
  5. Reedy SpringBerks County, best late January · 79 checklists that week, 1,113 in all72%
  6. Pymatuning ReservoirCrawford County, best the second week of March · 20 checklists that week, 223 in all72%

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

Best time of day

In Pennsylvania, the Redhead is most often listed on checklists started between 2 and 4 pm (1.2% of those checklists).

0%0.5%1%1.5%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: 0.2% of 92903 checklists7 am: 0.4% of 241233 checklists8 am: 0.5% of 271994 checklists9 am: 0.7% of 236842 checklists10 am: 0.9% of 199508 checklists11 am: 1.0% of 161893 checklists12 pm: 1.1% of 143945 checklists1 pm: 1.1% of 134352 checklists2 pm: 1.2% of 129692 checklists3 pm: 1.1% of 126132 checklists4 pm: 1.0% of 115055 checklists5 pm: 0.6% of 90719 checklists6 pm: 0.3% of 67534 checklists7 pm: 0.1% 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
January1.2%1.2%1.8%2.2%
February2.7%2.3%2.0%3.6%
March4.2%3.5%2.3%1.4%
April0.8%0.3%0.2%0.1%
May0.1%0.1%0.1%0.1%
June0.1%0.1%0.1%0.1%
July0.1%0.1%0.1%0.1%
August0.1%0.3%0.1%0.1%
September0.1%0.1%0.1%0.1%
October0.1%0.1%0.1%0.2%
November0.3%0.4%0.5%0.5%
December0.8%0.7%0.6%1.1%

Neighboring states

  • Maryland: arrives mid November, 6 weeks earlier than Pennsylvania
  • District of Columbia: arrives late November, 5 weeks earlier than Pennsylvania
  • New Jersey: arrives mid November, 6 weeks earlier than Pennsylvania
  • New York: arrives early November, 8 weeks earlier than Pennsylvania

Common questions

When do Redheads arrive in Pennsylvania?
Redheads are winter birds in Pennsylvania: they arrive in early January, peak in early March (3.7% of checklists), and most are gone by late March.
When do Redheads leave Pennsylvania?
Most Redheads have left Pennsylvania by late March, when reports fall below half their usual rate.
When is the best time to see a Redhead in Pennsylvania?
The Redhead is reported most often in early March, on about 3.7% of Pennsylvania checklists.
Where in Pennsylvania are Redheads seen most often?
By county, Crawford County, Erie County, and Mercer County have the highest peak reporting rates for the Redhead (counties with at least 200 checklists).