WhenToBird

Setophaga striata · Parulidae

When Do Blackpoll Warblers Arrive in Maine?

Adult Blackpoll Warbler
Photo: John Rosford, CC BY 4.0 via iNaturalist

Blackpoll Warblers arrive in Maine in the second week of May, peak in late May (6.4% of checklists), and most are gone by mid June.

When to look

First arrivalsMay 8-14the second week of May
Common byMay 8-14the second week of May
PeakMay 22-31late May
Most gone byJun 15-21mid June

Best: late May. First arrivals the second week of May; most are gone by mid June. Peak: on about 6.4% of Maine checklists.

  1. Jannot usually seen
  2. Febnot usually seen
  3. Marnot usually seen
  4. Aprnot usually seen
  5. Maypeak season
  6. Junpeak season
  7. Julrare
  8. Auguncommon
  9. Seppeak season
  10. Octpeak season
  11. Novrare
  12. Decnot usually seen

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

0%5%10%Jan 1-7: 0% of 15499 checklistsJan 8-14: 0% of 11141 checklistsJan 15-21: 0% of 10729 checklistsJan 22-31: 0% of 15084 checklistsFeb 1-7: 0% of 9403 checklistsFeb 8-14: 0% of 11268 checklistsFeb 15-21: 0% of 14061 checklistsFeb 22-28: 0% of 9977 checklistsMar 1-7: 0% of 9649 checklistsMar 8-14: 0% of 11781 checklistsMar 15-21: 0% of 11613 checklistsMar 22-31: 0% of 17798 checklistsApr 1-7: 0% of 14638 checklistsApr 8-14: 0% of 16511 checklistsApr 15-21: 0% of 17164 checklistsApr 22-30: 0.1% of 22602 checklistsMay 1-7: 0.1% of 22556 checklistsMay 8-14: 1.6% of 27842 checklistsMay 15-21: 7.1% of 27748 checklistsMay 22-31: 8.7% of 38715 checklistsJun 1-7: 2.5% of 26916 checklistsJun 8-14: 1.2% of 23737 checklistsJun 15-21: 1.2% of 22733 checklistsJun 22-30: 1.0% of 28248 checklistsJul 1-7: 0.6% of 20290 checklistsJul 8-14: 0.7% of 18534 checklistsJul 15-21: 0.5% of 17319 checklistsJul 22-31: 0.3% of 22815 checklistsAug 1-7: 0.3% of 15004 checklistsAug 8-14: 0.2% of 14603 checklistsAug 15-21: 0.4% of 14972 checklistsAug 22-31: 0.9% of 19813 checklistsSep 1-7: 1.9% of 14567 checklistsSep 8-14: 3.6% of 14520 checklistsSep 15-21: 5.7% of 14339 checklistsSep 22-30: 7.3% of 16879 checklistsOct 1-7: 5.7% of 12959 checklistsOct 8-14: 3.6% of 13168 checklistsOct 15-21: 1.7% of 11184 checklistsOct 22-31: 0.7% of 13717 checklistsNov 1-7: 0.2% of 9823 checklistsNov 8-14: 0.1% of 9007 checklistsNov 15-21: 0.1% of 8528 checklistsNov 22-30: 0.1% of 10228 checklistsDec 1-7: 0% of 7505 checklistsDec 8-14: 0% of 7982 checklistsDec 15-21: 0% of 10455 checklistsDec 22-31: 0% 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. Lincoln CountyBest late May · 3553 checklists that week, 59,429 in all17%
  2. Franklin CountyBest the second week of June · 939 checklists that week, 14,182 in all16%
  3. Waldo CountyBest mid September · 618 checklists that week, 33,433 in all12%
  4. York CountyBest early October · 1826 checklists that week, 101,844 in all9.5%
  5. Cumberland CountyBest late May · 7598 checklists that week, 169,501 in all8.5%
  6. Piscataquis CountyBest the second week of June · 1040 checklists that week, 14,837 in all5.9%

Best spots

Share of checklists at the peak
  1. Appalachian National Scenic TrailFranklin County, best the second week of June · 20 checklists that week, 166 in all88%
  2. Scottow BogCumberland County, best late September · 20 checklists that week, 141 in all65%
  3. Monhegan IslandLincoln County, best early June · 78 checklists that week, 4,434 in all61%
  4. Sandy Point Beach on Cousins IslandCumberland County, best late September · 101 checklists that week, 760 in all48%
  5. Cobbosseecontee Stream ReservoirKennebec County, best late May · 53 checklists that week, 297 in all48%
  6. Fort Foster ParkYork County, best early October · 46 checklists that week, 2,318 in all48%

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

Best time of day

In Maine, the Blackpoll Warbler is most often listed on checklists started between 5 and 7 am (4.3% 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: 4.1% of 19895 checklists6 am: 4.4% of 54578 checklists7 am: 2.4% of 92775 checklists8 am: 1.8% of 86962 checklists9 am: 1.5% of 78989 checklists10 am: 1.2% of 70954 checklists11 am: 1.0% of 59331 checklists12 pm: 1.0% of 50943 checklists1 pm: 1.0% of 49775 checklists2 pm: 0.8% of 49001 checklists3 pm: 0.8% of 43252 checklists4 pm: 1.0% of 33413 checklists5 pm: 0.8% of 25547 checklists6 pm: 0.5% 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
January0%0%0%0%
February0%0%0%0%
March0%0%0%0%
April0%0%0%0.1%
May0.1%1.6%7.1%8.7%
June2.5%1.2%1.2%1.0%
July0.6%0.7%0.5%0.3%
August0.3%0.2%0.4%0.9%
September1.9%3.6%5.7%7.3%
October5.7%3.6%1.7%0.7%
November0.2%0.1%0.1%0.1%
December0%0%0%0%

Neighboring states

  • New Hampshire: arrives late August, 14 weeks later than Maine
  • Massachusetts: arrives early September, 15 weeks later than Maine
  • Vermont: arrives late August, 14 weeks later than Maine
  • Rhode Island: arrives early September, 15 weeks later than Maine

Common questions

When do Blackpoll Warblers arrive in Maine?
Blackpoll Warblers arrive in Maine in the second week of May, peak in late May (6.4% of checklists), and most are gone by mid June.
When do Blackpoll Warblers leave Maine?
Most Blackpoll Warblers have left Maine by mid June, when reports fall below half their usual rate.
When is the best time to see a Blackpoll Warbler in Maine?
The Blackpoll Warbler is reported most often in late May, on about 6.4% of Maine checklists.
Where in Maine are Blackpoll Warblers seen most often?
By county, Lincoln County, Franklin County, and Waldo County have the highest peak reporting rates for the Blackpoll Warbler (counties with at least 200 checklists).