WhenToBird

Mimus polyglottos · Mimidae

When Do Northern Mockingbirds Arrive in Maine?

Adult Northern Mockingbird
Photo: Bill Keim, CC BY 4.0 via iNaturalist

The Northern Mockingbird is in Maine all year. It turns up on about 6.3% of checklists at its peak (the second week of May) and on 2.9% in its quietest week (mid February).

When to look

PresentAll year
Peak weekMay 8-14the second week of May
Quietest weekFeb 15-21mid February

Best: the second week of May. Here all year. Peak: on about 6.3% of Maine checklists.

  1. Jancommon
  2. Febcommon
  3. Marcommon
  4. Aprpeak season
  5. Maypeak season
  6. Juncommon
  7. Julcommon
  8. Augcommon
  9. Sepcommon
  10. Octpeak season
  11. Novpeak season
  12. Decpeak season

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

0%2%4%6%8%Jan 1-7: 3.6% of 15499 checklistsJan 8-14: 3.4% of 11141 checklistsJan 15-21: 3.1% of 10729 checklistsJan 22-31: 3.5% of 15084 checklistsFeb 1-7: 3.2% of 9403 checklistsFeb 8-14: 2.9% of 11268 checklistsFeb 15-21: 2.9% of 14061 checklistsFeb 22-28: 3.0% of 9977 checklistsMar 1-7: 3.1% of 9649 checklistsMar 8-14: 2.8% of 11781 checklistsMar 15-21: 3.7% of 11613 checklistsMar 22-31: 4.1% of 17798 checklistsApr 1-7: 4.5% of 14638 checklistsApr 8-14: 5.3% of 16511 checklistsApr 15-21: 5.3% of 17164 checklistsApr 22-30: 5.3% of 22602 checklistsMay 1-7: 6.4% of 22556 checklistsMay 8-14: 6.4% of 27842 checklistsMay 15-21: 6.0% of 27748 checklistsMay 22-31: 4.6% of 38715 checklistsJun 1-7: 3.6% of 26916 checklistsJun 8-14: 4.0% of 23737 checklistsJun 15-21: 3.6% of 22733 checklistsJun 22-30: 3.4% of 28248 checklistsJul 1-7: 3.9% of 20290 checklistsJul 8-14: 4.4% of 18534 checklistsJul 15-21: 4.1% of 17319 checklistsJul 22-31: 4.2% of 22815 checklistsAug 1-7: 4.1% of 15004 checklistsAug 8-14: 3.9% of 14603 checklistsAug 15-21: 3.4% of 14972 checklistsAug 22-31: 3.4% of 19813 checklistsSep 1-7: 3.7% of 14567 checklistsSep 8-14: 3.9% of 14520 checklistsSep 15-21: 4.2% of 14339 checklistsSep 22-30: 4.0% of 16879 checklistsOct 1-7: 4.8% of 12959 checklistsOct 8-14: 4.4% of 13168 checklistsOct 15-21: 5.0% of 11184 checklistsOct 22-31: 5.8% of 13717 checklistsNov 1-7: 6.0% of 9823 checklistsNov 8-14: 5.7% of 9007 checklistsNov 15-21: 5.2% of 8528 checklistsNov 22-30: 5.8% of 10228 checklistsDec 1-7: 5.4% of 7505 checklistsDec 8-14: 5.2% of 7982 checklistsDec 15-21: 4.3% of 10455 checklistsDec 22-31: 3.9% 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. York CountyBest the second week of May · 3742 checklists that week, 101,844 in all18%
  2. Cumberland CountyBest mid June · 3433 checklists that week, 169,501 in all11%
  3. Androscoggin CountyBest the second week of May · 810 checklists that week, 16,955 in all11%
  4. Kennebec CountyBest the second week of July · 1072 checklists that week, 48,185 in all3.2%
  5. Penobscot CountyBest the second week of July · 1041 checklists that week, 56,895 in all3.0%
  6. Lincoln CountyBest late September · 2193 checklists that week, 59,429 in all2.6%

Best spots

Share of checklists at the peak
  1. Eastern PromenadeCumberland County, best the second week of October · 29 checklists that week, 1,074 in all93%
  2. Fort Foster ParkYork County, best early June · 29 checklists that week, 2,318 in all92%
  3. Goose Rocks Beach, King's HighwayYork County, best late May · 42 checklists that week, 354 in all74%
  4. Timber PointYork County, best late April · 128 checklists that week, 3,561 in all73%

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

Best time of day

In Maine, the Northern Mockingbird is most often listed on checklists started between 7 and 9 am (5.5% of those checklists).

0%2%4%6%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: 4.3% of 19895 checklists6 am: 5.0% of 54578 checklists7 am: 5.7% of 92775 checklists8 am: 5.3% of 86962 checklists9 am: 4.8% of 78989 checklists10 am: 4.6% of 70954 checklists11 am: 4.3% of 59331 checklists12 pm: 3.9% of 50943 checklists1 pm: 4.0% of 49775 checklists2 pm: 3.6% of 49001 checklists3 pm: 3.1% of 43252 checklists4 pm: 3.4% of 33413 checklists5 pm: 3.6% of 25547 checklists6 pm: 3.8% 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
January3.6%3.4%3.1%3.5%
February3.2%2.9%2.9%3.0%
March3.1%2.8%3.7%4.1%
April4.5%5.3%5.3%5.3%
May6.4%6.4%6.0%4.6%
June3.6%4.0%3.6%3.4%
July3.9%4.4%4.1%4.2%
August4.1%3.9%3.4%3.4%
September3.7%3.9%4.2%4.0%
October4.8%4.4%5.0%5.8%
November6.0%5.7%5.2%5.8%
December5.4%5.2%4.3%3.9%

Neighboring states

Common questions

When do Northern Mockingbirds arrive in Maine?
The Northern Mockingbird is in Maine all year. It turns up on about 6.3% of checklists at its peak (the second week of May) and on 2.9% in its quietest week (mid February).
When do Northern Mockingbirds leave Maine?
The Northern Mockingbird does not leave Maine: it is reported all year, from 2.9% of checklists in mid February to 6.3% in the second week of May.
When is the best time to see a Northern Mockingbird in Maine?
The Northern Mockingbird is reported most often in the second week of May, on about 6.3% of Maine checklists.
Where in Maine are Northern Mockingbirds seen most often?
By county, York County, Cumberland County, and Androscoggin County have the highest peak reporting rates for the Northern Mockingbird (counties with at least 200 checklists).