WhenToBird

Troglodytes hiemalis · Troglodytidae

When Do Winter Wrens Arrive in Maryland?

Adult Winter Wren
Photo: Derek Spencer, CC BY 4.0 via iNaturalist

Winter Wrens are winter birds in Maryland: the first arrive in early October, they are common by the second week of October, peak in mid November (8.8% of checklists), and most are gone by early April.

When to look

First arrivalsOct 1-7early October
Common byOct 8-14the second week of October
PeakNov 15-21mid November
Most gone byApr 1-7early April

Best: mid November. First arrivals early October; most are gone by early April. Peak: on about 8.8% of Maryland checklists.

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

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

0%5%10%Jan 1-7: 5.9% of 28716 checklistsJan 8-14: 5.3% of 21449 checklistsJan 15-21: 4.8% of 21267 checklistsJan 22-31: 5.3% of 29144 checklistsFeb 1-7: 4.5% of 21347 checklistsFeb 8-14: 3.4% of 22166 checklistsFeb 15-21: 2.9% of 29986 checklistsFeb 22-28: 3.8% of 22427 checklistsMar 1-7: 3.3% of 21389 checklistsMar 8-14: 3.3% of 22192 checklistsMar 15-21: 3.7% of 22823 checklistsMar 22-31: 3.6% of 33720 checklistsApr 1-7: 2.7% of 25513 checklistsApr 8-14: 1.6% of 27718 checklistsApr 15-21: 0.8% of 29328 checklistsApr 22-30: 0.3% of 42595 checklistsMay 1-7: 0.1% of 38532 checklistsMay 8-14: 0.1% of 42722 checklistsMay 15-21: 0.1% of 31936 checklistsMay 22-31: 0.1% of 36903 checklistsJun 1-7: 0.1% of 23191 checklistsJun 8-14: 0.1% of 21853 checklistsJun 15-21: 0.1% of 21000 checklistsJun 22-30: 0.1% of 25133 checklistsJul 1-7: 0.1% of 18715 checklistsJul 8-14: 0.1% of 16376 checklistsJul 15-21: 0.1% of 15793 checklistsJul 22-31: 0.1% of 21969 checklistsAug 1-7: 0.1% of 16013 checklistsAug 8-14: 0.1% of 15249 checklistsAug 15-21: 0.1% of 15674 checklistsAug 22-31: 0.1% of 24925 checklistsSep 1-7: 0.1% of 19808 checklistsSep 8-14: 0.1% of 18513 checklistsSep 15-21: 0.1% of 21901 checklistsSep 22-30: 0.7% of 22901 checklistsOct 1-7: 2.1% of 19111 checklistsOct 8-14: 4.3% of 18482 checklistsOct 15-21: 6.2% of 17380 checklistsOct 22-31: 7.5% of 23992 checklistsNov 1-7: 8.2% of 17915 checklistsNov 8-14: 8.9% of 18905 checklistsNov 15-21: 9.1% of 16259 checklistsNov 22-30: 8.6% of 22852 checklistsDec 1-7: 8.6% of 16108 checklistsDec 8-14: 7.8% of 16512 checklistsDec 15-21: 8.8% of 18952 checklistsDec 22-31: 7.9% of 29728 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 Maryland 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 Maryland

Best counties

Share of checklists at the peak
  1. Cecil CountyBest mid November · 311 checklists that week, 18,620 in all16%
  2. Harford CountyBest late November · 871 checklists that week, 39,311 in all14%
  3. Washington CountyBest mid January · 322 checklists that week, 24,020 in all13%
  4. Montgomery CountyBest the second week of November · 3201 checklists that week, 219,548 in all13%
  5. Baltimore CountyBest early November · 2254 checklists that week, 136,139 in all13%
  6. Queen Anne's CountyBest early December · 429 checklists that week, 26,875 in all12%

Best spots

Share of checklists at the peak
  1. Putuxent River ParkPrince George's County, best mid November · 22 checklists that week, 1,168 in all76%
  2. Mckee Beshers WmaMontgomery County, best late November · 86 checklists that week, 9,478 in all71%
  3. Wyman ParkBaltimore County, best mid November · 21 checklists that week, 1,949 in all64%
  4. Herring Run ParkBaltimore County, best mid October · 33 checklists that week, 940 in all53%
  5. Turkey PointCecil County, best mid November · 24 checklists that week, 976 in all53%
  6. Chesapeake and Ohio Canal National Historical Park (Muddy Branch)Montgomery County, best late December · 54 checklists that week, 2,919 in all51%

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

Best time of day

In Maryland, the Winter Wren is most often listed on checklists started between 7 and 9 am (3.4% of those checklists).

0%1%2%3%4%12 am: too few checklists (486) to judge1 am: too few checklists (451) to judge2 am: too few checklists (447) to judge3 am: too few checklists (766) to judge4 am: too few checklists (2076) to judge5 am: too few checklists (11098) to judge6 am: 2.9% of 56604 checklists7 am: 3.6% of 139255 checklists8 am: 3.3% of 148626 checklists9 am: 3.3% of 126820 checklists10 am: 3.2% of 106973 checklists11 am: 2.9% of 87483 checklists12 pm: 2.8% of 74808 checklists1 pm: 2.9% of 69428 checklists2 pm: 2.9% of 67800 checklists3 pm: 2.8% of 67688 checklists4 pm: 2.1% of 60927 checklists5 pm: 1.1% of 43876 checklists6 pm: 0.4% of 32930 checklists7 pm: too few checklists (19051) to judge8 pm: too few checklists (5708) to judge9 pm: too few checklists (1977) to judge10 pm: too few checklists (1170) to judge11 pm: too few checklists (635) 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
January5.9%5.3%4.8%5.3%
February4.5%3.4%2.9%3.8%
March3.3%3.3%3.7%3.6%
April2.7%1.6%0.8%0.3%
May0.1%0.1%0.1%0.1%
June0.1%0.1%0.1%0.1%
July0.1%0.1%0.1%0.1%
August0.1%0.1%0.1%0.1%
September0.1%0.1%0.1%0.7%
October2.1%4.3%6.2%7.5%
November8.2%8.9%9.1%8.6%
December8.6%7.8%8.8%7.9%

Neighboring states

  • District of Columbia: arrives early October, in the same week than Maryland
  • Delaware: arrives early October, in the same week than Maryland
  • Virginia: arrives early October, in the same week than Maryland
  • Pennsylvania: arrives late September, 1 week earlier than Maryland

Common questions

When do Winter Wrens arrive in Maryland?
Winter Wrens are winter birds in Maryland: the first arrive in early October, they are common by the second week of October, peak in mid November (8.8% of checklists), and most are gone by early April.
When do Winter Wrens leave Maryland?
Most Winter Wrens have left Maryland by early April, when reports fall below half their usual rate. Stragglers are still reported until the second week of April.
When is the best time to see a Winter Wren in Maryland?
The Winter Wren is reported most often in mid November, on about 8.8% of Maryland checklists.
Where in Maryland are Winter Wrens seen most often?
By county, Cecil County, Harford County, and Washington County have the highest peak reporting rates for the Winter Wren (counties with at least 200 checklists).