WhenToBird

Anas crecca · Anatidae

When Do Green-winged Teals Arrive in Maryland?

Adult Green-winged Teal
Photo: Mark, CC BY 4.0 via iNaturalist

Green-winged Teals are winter birds in Maryland: the first arrive in the second week of September, they are common by mid September, peak in mid March (5.5% 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
PeakMar 15-21mid March
Most gone byApr 15-21mid April

Best: mid March. First arrivals the second week of September; most are gone by mid April. Peak: on about 5.5% of Maryland checklists.

  1. Januncommon
  2. Febcommon
  3. Marpeak season
  4. Aprpeak season
  5. Mayrare
  6. Junnot usually seen
  7. Julnot usually seen
  8. Augrare
  9. Sepuncommon
  10. Octcommon
  11. Novcommon
  12. Deccommon

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

0%2%4%6%Jan 1-7: 1.9% of 28716 checklistsJan 8-14: 1.6% of 21449 checklistsJan 15-21: 1.4% of 21267 checklistsJan 22-31: 1.3% of 29144 checklistsFeb 1-7: 1.9% of 21347 checklistsFeb 8-14: 2.4% of 22166 checklistsFeb 15-21: 2.4% of 29986 checklistsFeb 22-28: 4.2% of 22427 checklistsMar 1-7: 5.2% of 21389 checklistsMar 8-14: 5.2% of 22192 checklistsMar 15-21: 5.9% of 22823 checklistsMar 22-31: 5.6% of 33720 checklistsApr 1-7: 4.2% of 25513 checklistsApr 8-14: 3.2% of 27718 checklistsApr 15-21: 2.0% of 29328 checklistsApr 22-30: 0.9% of 42595 checklistsMay 1-7: 0.2% of 38532 checklistsMay 8-14: 0.1% of 42722 checklistsMay 15-21: 0.1% of 31936 checklistsMay 22-31: 0% of 36903 checklistsJun 1-7: 0% 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: 0.2% of 15249 checklistsAug 15-21: 0.3% of 15674 checklistsAug 22-31: 0.8% of 24925 checklistsSep 1-7: 1.0% of 19808 checklistsSep 8-14: 1.0% of 18513 checklistsSep 15-21: 1.5% of 21901 checklistsSep 22-30: 2.0% of 22901 checklistsOct 1-7: 1.9% of 19111 checklistsOct 8-14: 2.8% of 18482 checklistsOct 15-21: 3.0% of 17380 checklistsOct 22-31: 3.3% of 23992 checklistsNov 1-7: 3.6% of 17915 checklistsNov 8-14: 4.1% of 18905 checklistsNov 15-21: 3.6% of 16259 checklistsNov 22-30: 3.6% of 22852 checklistsDec 1-7: 2.7% of 16108 checklistsDec 8-14: 2.0% of 16512 checklistsDec 15-21: 1.9% of 18952 checklistsDec 22-31: 2.0% 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. Somerset CountyBest the second week of March · 229 checklists that week, 9,451 in all24%
  2. Dorchester CountyBest late March · 641 checklists that week, 26,161 in all21%
  3. Kent CountyBest late October · 254 checklists that week, 13,396 in all18%
  4. Talbot CountyBest mid March · 668 checklists that week, 31,140 in all17%
  5. Caroline CountyBest late March · 320 checklists that week, 11,067 in all14%
  6. Queen Anne's CountyBest late March · 707 checklists that week, 26,875 in all9.3%

Best spots

Share of checklists at the peak
  1. Montrose Farm PondKent County, best late October · 29 checklists that week, 632 in all81%
  2. Poplar NeckKent County, best early December · 36 checklists that week, 474 in all81%
  3. Greene BranchBaltimore County, best mid March · 39 checklists that week, 1,888 in all78%
  4. Patuxent Oxbow Heritage ConservationAnne Arundel County, best mid March · 54 checklists that week, 1,693 in all74%
  5. Montgomery CountyMontgomery County, best the second week of November · 130 checklists that week, 6,363 in all74%

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

Best time of day

In Maryland, the Green-winged Teal is most often listed on checklists started between 1 and 3 pm (2.1% of those checklists).

0%1%2%3%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: 1.9% of 56604 checklists7 am: 1.9% of 139255 checklists8 am: 1.7% of 148626 checklists9 am: 1.9% of 126820 checklists10 am: 2.0% of 106973 checklists11 am: 2.0% of 87483 checklists12 pm: 2.0% of 74808 checklists1 pm: 2.0% of 69428 checklists2 pm: 2.1% of 67800 checklists3 pm: 2.0% of 67688 checklists4 pm: 2.0% of 60927 checklists5 pm: 2.0% of 43876 checklists6 pm: 1.1% 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
January1.9%1.6%1.4%1.3%
February1.9%2.4%2.4%4.2%
March5.2%5.2%5.9%5.6%
April4.2%3.2%2.0%0.9%
May0.2%0.1%0.1%0%
June0%0.1%0.1%0.1%
July0.1%0.1%0.1%0.1%
August0.1%0.2%0.3%0.8%
September1.0%1.0%1.5%2.0%
October1.9%2.8%3.0%3.3%
November3.6%4.1%3.6%3.6%
December2.7%2.0%1.9%2.0%

Neighboring states

  • District of Columbia: arrives mid January, 17 weeks later than Maryland
  • Delaware: arrives the second week of August, 4 weeks earlier than Maryland
  • Virginia: arrives early October, 3 weeks later than Maryland
  • Pennsylvania: arrives early September, 1 week earlier than Maryland

Common questions

When do Green-winged Teals arrive in Maryland?
Green-winged Teals are winter birds in Maryland: the first arrive in the second week of September, they are common by mid September, peak in mid March (5.5% of checklists), and most are gone by mid April.
When do Green-winged Teals leave Maryland?
Most Green-winged Teals have left Maryland by mid April, when reports fall below half their usual rate.
When is the best time to see a Green-winged Teal in Maryland?
The Green-winged Teal is reported most often in mid March, on about 5.5% of Maryland checklists.
Where in Maryland are Green-winged Teals seen most often?
By county, Somerset County, Dorchester County, and Kent County have the highest peak reporting rates for the Green-winged Teal (counties with at least 200 checklists).