WhenToBird

Podilymbus podiceps · Podicipedidae

When Do Pied-billed Grebes Arrive in New Jersey?

Adult Pied-billed Grebe
Photo: Rodrigo Paiva Lázaro, CC BY 4.0 via iNaturalist

Pied-billed Grebes are winter birds in New Jersey: the first arrive in the second week of September, they are common by mid September, peak in early November (6.2% of checklists), and most are gone by mid April.

When to look

First arrivalsSep 8-14the second week of September
Common bySep 15-21mid September
PeakNov 1-7early November
Most gone byApr 15-21mid April

Best: early November. First arrivals the second week of September; most are gone by mid April. Peak: on about 6.2% of New Jersey checklists.

  1. Januncommon
  2. Febuncommon
  3. Marcommon
  4. Aprcommon
  5. Mayrare
  6. Junnot usually seen
  7. Julrare
  8. Augrare
  9. Sepcommon
  10. Octpeak season
  11. Novpeak season
  12. Deccommon

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

0%2%4%6%8%Jan 1-7: 2.5% of 28167 checklistsJan 8-14: 2.5% of 20583 checklistsJan 15-21: 1.8% of 19739 checklistsJan 22-31: 1.9% of 24586 checklistsFeb 1-7: 1.6% of 17226 checklistsFeb 8-14: 1.3% of 19567 checklistsFeb 15-21: 1.3% of 26553 checklistsFeb 22-28: 1.8% of 19046 checklistsMar 1-7: 2.3% of 17969 checklistsMar 8-14: 2.5% of 18976 checklistsMar 15-21: 3.3% of 18581 checklistsMar 22-31: 4.2% of 27590 checklistsApr 1-7: 4.5% of 21202 checklistsApr 8-14: 3.4% of 23609 checklistsApr 15-21: 1.6% of 25056 checklistsApr 22-30: 0.7% of 36679 checklistsMay 1-7: 0.4% of 38378 checklistsMay 8-14: 0.3% of 44071 checklistsMay 15-21: 0.2% of 34076 checklistsMay 22-31: 0.2% of 32558 checklistsJun 1-7: 0.1% of 18049 checklistsJun 8-14: 0.2% of 15597 checklistsJun 15-21: 0.1% of 14894 checklistsJun 22-30: 0.2% of 17187 checklistsJul 1-7: 0.1% of 13406 checklistsJul 8-14: 0.2% of 12550 checklistsJul 15-21: 0.4% of 12358 checklistsJul 22-31: 0.4% of 18382 checklistsAug 1-7: 0.6% of 13689 checklistsAug 8-14: 0.7% of 14006 checklistsAug 15-21: 0.7% of 14483 checklistsAug 22-31: 0.5% of 23182 checklistsSep 1-7: 0.7% of 17984 checklistsSep 8-14: 1.5% of 18320 checklistsSep 15-21: 1.7% of 20491 checklistsSep 22-30: 2.6% of 26176 checklistsOct 1-7: 3.5% of 24112 checklistsOct 8-14: 4.5% of 24603 checklistsOct 15-21: 5.5% of 24549 checklistsOct 22-31: 6.4% of 26206 checklistsNov 1-7: 5.7% of 17469 checklistsNov 8-14: 6.3% of 15102 checklistsNov 15-21: 5.7% of 14958 checklistsNov 22-30: 5.0% of 19447 checklistsDec 1-7: 4.4% of 14017 checklistsDec 8-14: 3.9% of 14625 checklistsDec 15-21: 2.3% of 16937 checklistsDec 22-31: 2.0% 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. Atlantic CountyBest early November · 405 checklists that week, 28,208 in all16%
  2. Sussex CountyBest early April · 703 checklists that week, 30,305 in all16%
  3. Cape May CountyBest early November · 3485 checklists that week, 189,832 in all8.8%
  4. Monmouth CountyBest early December · 1137 checklists that week, 79,748 in all8.8%
  5. Hunterdon CountyBest the second week of November · 954 checklists that week, 57,610 in all8.8%
  6. Burlington CountyBest mid November · 773 checklists that week, 52,358 in all8.2%

Best spots

Share of checklists at the peak
  1. Lake CarasaljoOcean County, best mid October · 25 checklists that week, 1,087 in all84%
  2. Manasquan ReservoirMonmouth County, best early December · 37 checklists that week, 1,468 in all74%
  3. Swartswood State ParkSussex County, best the second week of November · 21 checklists that week, 714 in all72%
  4. Manasquan Reservoir (Middle Fork Timber Swamp Brook)Monmouth County, best early November · 30 checklists that week, 1,307 in all71%
  5. Duhernal LakeMiddlesex County, best late October · 20 checklists that week, 332 in all69%
  6. Lake ComoMonmouth County, best mid October · 21 checklists that week, 872 in all68%

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

Best time of day

In New Jersey, the Pied-billed Grebe is most often listed on checklists started between 1 and 3 pm (2.5% of those checklists).

0%1%2%3%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: 1.4% of 50447 checklists7 am: 2.1% of 118312 checklists8 am: 2.2% of 123273 checklists9 am: 2.3% of 107783 checklists10 am: 2.5% of 97537 checklists11 am: 2.4% of 82427 checklists12 pm: 2.4% of 72581 checklists1 pm: 2.5% of 71478 checklists2 pm: 2.5% of 69994 checklists3 pm: 2.3% of 66822 checklists4 pm: 2.1% of 55950 checklists5 pm: 1.5% of 41360 checklists6 pm: 0.8% 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
January2.5%2.5%1.8%1.9%
February1.6%1.3%1.3%1.8%
March2.3%2.5%3.3%4.2%
April4.5%3.4%1.6%0.7%
May0.4%0.3%0.2%0.2%
June0.1%0.2%0.1%0.2%
July0.1%0.2%0.4%0.4%
August0.6%0.7%0.7%0.5%
September0.7%1.5%1.7%2.6%
October3.5%4.5%5.5%6.4%
November5.7%6.3%5.7%5.0%
December4.4%3.9%2.3%2.0%

Neighboring states

  • Delaware: arrives early September, 1 week earlier than New Jersey
  • Connecticut: arrives the second week of September, in the same week than New Jersey
  • Pennsylvania: arrives late February, 22 weeks later than New Jersey
  • New York: arrives early July, 9 weeks earlier than New Jersey

Common questions

When do Pied-billed Grebes arrive in New Jersey?
Pied-billed Grebes are winter birds in New Jersey: the first arrive in the second week of September, they are common by mid September, peak in early November (6.2% of checklists), and most are gone by mid April.
When do Pied-billed Grebes leave New Jersey?
Most Pied-billed Grebes have left New Jersey by mid April, when reports fall below half their usual rate.
When is the best time to see a Pied-billed Grebe in New Jersey?
The Pied-billed Grebe is reported most often in early November, on about 6.2% of New Jersey checklists.
Where in New Jersey are Pied-billed Grebes seen most often?
By county, Atlantic County, Sussex County, and Cape May County have the highest peak reporting rates for the Pied-billed Grebe (counties with at least 200 checklists).