WhenToBird

Podiceps auritus · Podicipedidae

When Do Horned Grebes Arrive in Maine?

Adult Horned Grebe
Photo: Kalvin Chan, CC BY 4.0 via iNaturalist

Horned Grebes are winter birds in Maine: the first arrive in the second week of October, they are common by late October, peak in late December (6.7% of checklists), and most are gone by late March.

When to look

First arrivalsOct 8-14the second week of October
Common byOct 22-31late October
PeakDec 22-31late December
Most gone byMar 22-31late March

Best: late December. First arrivals the second week of October; most are gone by late March. Peak: on about 6.7% of Maine checklists.

  1. Janpeak season
  2. Febpeak season
  3. Marcommon
  4. Apruncommon
  5. Maynot usually seen
  6. Junnot usually seen
  7. Julnot usually seen
  8. Augnot usually seen
  9. Seprare
  10. Octcommon
  11. Novpeak season
  12. Decpeak season

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

0%2%4%6%8%Jan 1-7: 7.3% of 15499 checklistsJan 8-14: 5.2% of 11141 checklistsJan 15-21: 5.3% of 10729 checklistsJan 22-31: 5.4% of 15084 checklistsFeb 1-7: 4.9% of 9403 checklistsFeb 8-14: 5.0% of 11268 checklistsFeb 15-21: 4.2% of 14061 checklistsFeb 22-28: 5.2% of 9977 checklistsMar 1-7: 4.0% of 9649 checklistsMar 8-14: 3.8% of 11781 checklistsMar 15-21: 3.0% of 11613 checklistsMar 22-31: 2.7% of 17798 checklistsApr 1-7: 2.0% of 14638 checklistsApr 8-14: 1.6% of 16511 checklistsApr 15-21: 1.5% of 17164 checklistsApr 22-30: 0.6% of 22602 checklistsMay 1-7: 0.2% of 22556 checklistsMay 8-14: 0.1% of 27842 checklistsMay 15-21: 0.1% of 27748 checklistsMay 22-31: 0.1% of 38715 checklistsJun 1-7: 0.1% of 26916 checklistsJun 8-14: 0.1% of 23737 checklistsJun 15-21: 0.1% of 22733 checklistsJun 22-30: 0% of 28248 checklistsJul 1-7: 0% of 20290 checklistsJul 8-14: 0.1% of 18534 checklistsJul 15-21: 0% of 17319 checklistsJul 22-31: 0% of 22815 checklistsAug 1-7: 0.1% of 15004 checklistsAug 8-14: 0.1% of 14603 checklistsAug 15-21: 0.1% of 14972 checklistsAug 22-31: 0.1% of 19813 checklistsSep 1-7: 0.1% of 14567 checklistsSep 8-14: 0.1% of 14520 checklistsSep 15-21: 0.2% of 14339 checklistsSep 22-30: 0.4% of 16879 checklistsOct 1-7: 0.7% of 12959 checklistsOct 8-14: 1.1% of 13168 checklistsOct 15-21: 1.7% of 11184 checklistsOct 22-31: 3.1% of 13717 checklistsNov 1-7: 4.6% of 9823 checklistsNov 8-14: 4.7% of 9007 checklistsNov 15-21: 4.9% of 8528 checklistsNov 22-30: 6.3% of 10228 checklistsDec 1-7: 6.3% of 7505 checklistsDec 8-14: 5.6% of 7982 checklistsDec 15-21: 6.6% of 10455 checklistsDec 22-31: 6.1% of 14285 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 Maine 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 Maine

Best counties

Share of checklists at the peak
  1. Sagadahoc CountyBest late December · 477 checklists that week, 21,736 in all21%
  2. York CountyBest early December · 1296 checklists that week, 101,844 in all14%
  3. Knox CountyBest mid December · 401 checklists that week, 34,453 in all13%
  4. Washington CountyBest late November · 221 checklists that week, 35,967 in all12%
  5. Waldo CountyBest mid November · 369 checklists that week, 33,433 in all9.0%
  6. Hancock CountyBest the second week of December · 1122 checklists that week, 118,358 in all8.7%

Best spots

Share of checklists at the peak
  1. Back CreekYork County, best late November · 20 checklists that week, 620 in all82%
  2. Parsons BeachYork County, best the second week of December · 26 checklists that week, 1,272 in all80%
  3. Reid State ParkSagadahoc County, best mid February · 20 checklists that week, 663 in all78%
  4. Reid State Park (Outer Head)Sagadahoc County, best late January · 20 checklists that week, 401 in all72%
  5. Mackworth Island State ParkCumberland County, best early January · 20 checklists that week, 1,053 in all68%
  6. Popham Beach State ParkSagadahoc County, best mid December · 21 checklists that week, 749 in all67%

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

Best time of day

In Maine, the Horned Grebe is most often listed on checklists started between 1 and 3 pm (2.7% of those checklists).

0%1%2%3%12 am: too few checklists (510) to judge1 am: too few checklists (517) to judge2 am: too few checklists (581) to judge3 am: too few checklists (3242) to judge4 am: too few checklists (7221) to judge5 am: 0.1% of 19895 checklists6 am: 0.8% of 54578 checklists7 am: 1.1% of 92775 checklists8 am: 1.7% of 86962 checklists9 am: 2.0% of 78989 checklists10 am: 2.5% of 70954 checklists11 am: 2.6% of 59331 checklists12 pm: 2.6% of 50943 checklists1 pm: 2.8% of 49775 checklists2 pm: 2.6% of 49001 checklists3 pm: 2.1% of 43252 checklists4 pm: 1.1% of 33413 checklists5 pm: 0.4% of 25547 checklists6 pm: 0.2% of 18309 checklists7 pm: too few checklists (14287) to judge8 pm: too few checklists (5336) to judge9 pm: too few checklists (2253) to judge10 pm: too few checklists (1518) to judge11 pm: too few checklists (720) 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
January7.3%5.2%5.3%5.4%
February4.9%5.0%4.2%5.2%
March4.0%3.8%3.0%2.7%
April2.0%1.6%1.5%0.6%
May0.2%0.1%0.1%0.1%
June0.1%0.1%0.1%0%
July0%0.1%0%0%
August0.1%0.1%0.1%0.1%
September0.1%0.1%0.2%0.4%
October0.7%1.1%1.7%3.1%
November4.6%4.7%4.9%6.3%
December6.3%5.6%6.6%6.1%

Neighboring states

  • New Hampshire: arrives early November, 3 weeks later than Maine
  • Massachusetts: arrives late October, 2 weeks later than Maine
  • Vermont: arrives mid October, 1 week later than Maine
  • Rhode Island: arrives early November, 3 weeks later than Maine

Common questions

When do Horned Grebes arrive in Maine?
Horned Grebes are winter birds in Maine: the first arrive in the second week of October, they are common by late October, peak in late December (6.7% of checklists), and most are gone by late March.
When do Horned Grebes leave Maine?
Most Horned Grebes have left Maine by late March, when reports fall below half their usual rate. Stragglers are still reported until mid April.
When is the best time to see a Horned Grebe in Maine?
The Horned Grebe is reported most often in late December, on about 6.7% of Maine checklists.
Where in Maine are Horned Grebes seen most often?
By county, Sagadahoc County, York County, and Knox County have the highest peak reporting rates for the Horned Grebe (counties with at least 200 checklists).