WhenToBird

Aythya americana · Anatidae

When Do Redheads Arrive in New Jersey?

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

Redheads are winter birds in New Jersey: they arrive in mid November, peak in late January (2.0% of checklists), and most are gone by mid March.

When to look

First arrivalsNov 15-21mid November
Common byNov 15-21mid November
PeakJan 22-31late January
Most gone byMar 15-21mid March

Best: late January. First arrivals mid November; most are gone by mid March. Peak: on about 2.0% of New Jersey checklists.

  1. Janpeak season
  2. Febpeak season
  3. Marpeak season
  4. Aprrare
  5. Maynot usually seen
  6. Junnot usually seen
  7. Julnot usually seen
  8. Augnot usually seen
  9. Sepnot usually seen
  10. Octrare
  11. Novcommon
  12. Deccommon

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

0%1%2%3%Jan 1-7: 1.7% of 28167 checklistsJan 8-14: 1.9% of 20583 checklistsJan 15-21: 2.0% of 19739 checklistsJan 22-31: 2.0% of 24586 checklistsFeb 1-7: 2.2% of 17226 checklistsFeb 8-14: 1.8% of 19567 checklistsFeb 15-21: 1.5% of 26553 checklistsFeb 22-28: 2.1% of 19046 checklistsMar 1-7: 2.1% of 17969 checklistsMar 8-14: 1.3% of 18976 checklistsMar 15-21: 0.9% of 18581 checklistsMar 22-31: 0.4% of 27590 checklistsApr 1-7: 0.1% of 21202 checklistsApr 8-14: 0.1% of 23609 checklistsApr 15-21: 0.1% of 25056 checklistsApr 22-30: 0.1% of 36679 checklistsMay 1-7: 0% of 38378 checklistsMay 8-14: 0% of 44071 checklistsMay 15-21: 0% of 34076 checklistsMay 22-31: 0.1% of 32558 checklistsJun 1-7: 0% of 18049 checklistsJun 8-14: 0.1% of 15597 checklistsJun 15-21: 0% of 14894 checklistsJun 22-30: 0% of 17187 checklistsJul 1-7: 0% of 13406 checklistsJul 8-14: 0% of 12550 checklistsJul 15-21: 0% of 12358 checklistsJul 22-31: 0% of 18382 checklistsAug 1-7: 0% of 13689 checklistsAug 8-14: 0% of 14006 checklistsAug 15-21: 0% of 14483 checklistsAug 22-31: 0% of 23182 checklistsSep 1-7: 0% of 17984 checklistsSep 8-14: 0% of 18320 checklistsSep 15-21: 0% of 20491 checklistsSep 22-30: 0% of 26176 checklistsOct 1-7: 0% of 24112 checklistsOct 8-14: 0.1% of 24603 checklistsOct 15-21: 0.1% of 24549 checklistsOct 22-31: 0.3% of 26206 checklistsNov 1-7: 0.3% of 17469 checklistsNov 8-14: 0.6% of 15102 checklistsNov 15-21: 1.0% of 14958 checklistsNov 22-30: 0.8% of 19447 checklistsDec 1-7: 0.9% of 14017 checklistsDec 8-14: 1.0% of 14625 checklistsDec 15-21: 0.8% of 16937 checklistsDec 22-31: 0.9% of 26651 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 New Jersey 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 New Jersey

Best counties

Share of checklists at the peak
  1. Hunterdon CountyBest early February · 1011 checklists that week, 57,610 in all8.2%
  2. Warren CountyBest late January · 555 checklists that week, 20,077 in all7.4%
  3. Passaic CountyBest the second week of December · 324 checklists that week, 24,933 in all6.2%
  4. Sussex CountyBest late January · 622 checklists that week, 30,305 in all3.9%
  5. Ocean CountyBest late January · 2877 checklists that week, 87,340 in all3.9%
  6. Cape May CountyBest early January · 4219 checklists that week, 189,832 in all2.6%

Best spots

Share of checklists at the peak
  1. Packanack LakePassaic County, best mid February · 21 checklists that week, 317 in all77%
  2. Delaware and Raritan Canal State Park (Ambrose Brook)Somerset County, best early February · 23 checklists that week, 201 in all63%
  3. Point View ReservoirPassaic County, best the second week of January · 21 checklists that week, 487 in all58%
  4. Round Valley Recreation Area (north)Hunterdon County, best mid February · 25 checklists that week, 606 in all53%
  5. Commonwealth Water Company Reservoir Number ThreeEssex County, best late January · 26 checklists that week, 337 in all51%
  6. Lake of the LilliesOcean County, best late November · 106 checklists that week, 2,803 in all51%

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

Best time of day

In New Jersey, the Redhead is most often listed on checklists started between 1 and 3 pm (0.8% of those checklists).

0%0.5%1%12 am: too few checklists (746) to judge1 am: too few checklists (640) to judge2 am: too few checklists (606) to judge3 am: too few checklists (755) to judge4 am: too few checklists (1681) to judge5 am: too few checklists (11258) to judge6 am: 0.1% of 50447 checklists7 am: 0.3% of 118312 checklists8 am: 0.4% of 123273 checklists9 am: 0.6% of 107783 checklists10 am: 0.7% of 97537 checklists11 am: 0.8% of 82427 checklists12 pm: 0.8% of 72581 checklists1 pm: 0.7% of 71478 checklists2 pm: 0.8% of 69994 checklists3 pm: 0.7% of 66822 checklists4 pm: 0.5% of 55950 checklists5 pm: 0.1% of 41360 checklists6 pm: 0.1% of 28122 checklists7 pm: too few checklists (14727) to judge8 pm: too few checklists (4257) to judge9 pm: too few checklists (1273) to judge10 pm: too few checklists (920) to judge11 pm: too few checklists (693) 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
January1.7%1.9%2.0%2.0%
February2.2%1.8%1.5%2.1%
March2.1%1.3%0.9%0.4%
April0.1%0.1%0.1%0.1%
May0%0%0%0.1%
June0%0.1%0%0%
July0%0%0%0%
August0%0%0%0%
September0%0%0%0%
October0%0.1%0.1%0.3%
November0.3%0.6%1.0%0.8%
December0.9%1.0%0.8%0.9%

Neighboring states

  • Pennsylvania: arrives early January, 6 weeks later than New Jersey
  • New York: arrives early November, 2 weeks earlier than New Jersey
  • Maryland: arrives mid November, in the same week than New Jersey
  • District of Columbia: arrives late November, 1 week later than New Jersey

Common questions

When do Redheads arrive in New Jersey?
Redheads are winter birds in New Jersey: they arrive in mid November, peak in late January (2.0% of checklists), and most are gone by mid March.
When do Redheads leave New Jersey?
Most Redheads have left New Jersey by mid March, when reports fall below half their usual rate.
When is the best time to see a Redhead in New Jersey?
The Redhead is reported most often in late January, on about 2.0% of New Jersey checklists.
Where in New Jersey are Redheads seen most often?
By county, Hunterdon County, Warren County, and Passaic County have the highest peak reporting rates for the Redhead (counties with at least 200 checklists).