WhenToBird

Setophaga virens · Parulidae

When Do Black-throated Green Warblers Arrive in Virginia?

Adult Black-throated Green Warbler
Photo: Ken Clark, CC BY 4.0 via iNaturalist

Black-throated Green Warblers arrive in Virginia in late August, peak in late September (6.7% of checklists), and most are gone by mid October.

When to look

First arrivalsAug 22-31late August
Common byAug 22-31late August
PeakSep 22-30late September
Most gone byOct 15-21mid October

Best: late September. First arrivals late August; most are gone by mid October. Peak: on about 6.7% of Virginia checklists.

  1. Jannot usually seen
  2. Febnot usually seen
  3. Marnot usually seen
  4. Aprcommon
  5. Maypeak season
  6. Jununcommon
  7. Juluncommon
  8. Auguncommon
  9. Seppeak season
  10. Octpeak season
  11. Novnot usually seen
  12. Decnot usually seen

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

0%2%4%6%8%Jan 1-7: 0% of 32817 checklistsJan 8-14: 0% of 25111 checklistsJan 15-21: 0% of 25510 checklistsJan 22-31: 0% of 34492 checklistsFeb 1-7: 0% of 24950 checklistsFeb 8-14: 0% of 28224 checklistsFeb 15-21: 0% of 43578 checklistsFeb 22-28: 0% of 26467 checklistsMar 1-7: 0% of 25851 checklistsMar 8-14: 0.1% of 25901 checklistsMar 15-21: 0.1% of 26747 checklistsMar 22-31: 0.2% of 40819 checklistsApr 1-7: 0.5% of 31351 checklistsApr 8-14: 0.9% of 33239 checklistsApr 15-21: 2.0% of 37284 checklistsApr 22-30: 4.7% of 54364 checklistsMay 1-7: 7.4% of 47698 checklistsMay 8-14: 5.2% of 46174 checklistsMay 15-21: 3.1% of 36444 checklistsMay 22-31: 1.8% of 43203 checklistsJun 1-7: 1.8% of 28503 checklistsJun 8-14: 1.7% of 25485 checklistsJun 15-21: 1.6% of 23728 checklistsJun 22-30: 1.4% of 28785 checklistsJul 1-7: 1.0% of 22294 checklistsJul 8-14: 0.9% of 20481 checklistsJul 15-21: 0.7% of 18914 checklistsJul 22-31: 0.3% of 26976 checklistsAug 1-7: 0.3% of 19555 checklistsAug 8-14: 0.4% of 18744 checklistsAug 15-21: 0.5% of 18721 checklistsAug 22-31: 1.1% of 28763 checklistsSep 1-7: 2.7% of 23594 checklistsSep 8-14: 3.9% of 22581 checklistsSep 15-21: 6.4% of 23036 checklistsSep 22-30: 7.5% of 29687 checklistsOct 1-7: 6.1% of 24321 checklistsOct 8-14: 3.9% of 23946 checklistsOct 15-21: 1.4% of 22191 checklistsOct 22-31: 0.2% of 30161 checklistsNov 1-7: 0.1% of 21431 checklistsNov 8-14: 0.1% of 22758 checklistsNov 15-21: 0% of 19988 checklistsNov 22-30: 0% of 27665 checklistsDec 1-7: 0.1% of 19324 checklistsDec 8-14: 0% of 20316 checklistsDec 15-21: 0% of 25675 checklistsDec 22-31: 0% of 38677 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 Virginia 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 Virginia

Best counties

Share of checklists at the peak
  1. Manassas Park CountyBest late September · 11 checklists that week, 343 in all40%
  2. Dickenson CountyBest the second week of June · 60 checklists that week, 1,223 in all37%
  3. Greene CountyBest late September · 84 checklists that week, 2,866 in all34%
  4. Alleghany CountyBest late September · 16 checklists that week, 1,074 in all31%
  5. Buchanan CountyBest early September · 30 checklists that week, 1,612 in all26%
  6. Bland CountyBest mid May · 39 checklists that week, 780 in all24%

Best spots

Share of checklists at the peak
  1. Skidmore Fork LakeRockingham County, best late April · 40 checklists that week, 466 in all87%
  2. Jefferson National Forest (Gap Mountain)Montgomery County, best late April · 21 checklists that week, 289 in all73%
  3. Dismal Swamp Canal Trail (Douglas Landing)Chesapeake County, best the second week of April · 22 checklists that week, 169 in all70%
  4. Rimel Wildlife Management AreaHighland County, best early June · 40 checklists that week, 166 in all66%
  5. Observatory HillAlbemarle County, best early May · 245 checklists that week, 913 in all65%
  6. Jefferson National Forest (Thomas Mountain)Botetourt County, best late April · 27 checklists that week, 154 in all64%

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

Best time of day

In Virginia, the Black-throated Green Warbler is most often listed on checklists started between 6 and 8 am (3.0% of those checklists).

0%1%2%3%4%12 am: too few checklists (485) to judge1 am: too few checklists (488) to judge2 am: too few checklists (423) to judge3 am: too few checklists (565) to judge4 am: too few checklists (1410) to judge5 am: too few checklists (10265) to judge6 am: 3.2% of 64788 checklists7 am: 3.0% of 169128 checklists8 am: 2.3% of 180748 checklists9 am: 1.9% of 153462 checklists10 am: 1.6% of 128966 checklists11 am: 1.4% of 104204 checklists12 pm: 1.2% of 91604 checklists1 pm: 1.0% of 85547 checklists2 pm: 0.8% of 82355 checklists3 pm: 0.7% of 82265 checklists4 pm: 0.8% of 76714 checklists5 pm: 0.8% of 56782 checklists6 pm: 0.6% of 40131 checklists7 pm: too few checklists (24290) to judge8 pm: too few checklists (7744) to judge9 pm: too few checklists (2383) to judge10 pm: too few checklists (1122) to judge11 pm: too few checklists (651) 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%0.1%0.1%0.2%
April0.5%0.9%2.0%4.7%
May7.4%5.2%3.1%1.8%
June1.8%1.7%1.6%1.4%
July1.0%0.9%0.7%0.3%
August0.3%0.4%0.5%1.1%
September2.7%3.9%6.4%7.5%
October6.1%3.9%1.4%0.2%
November0.1%0.1%0%0%
December0.1%0%0%0%

Neighboring states

  • District of Columbia: arrives mid August, 1 week earlier than Virginia
  • Maryland: arrives mid August, 1 week earlier than Virginia
  • West Virginia: arrives early April, 19 weeks earlier than Virginia
  • Delaware: arrives late August, in the same week than Virginia

Common questions

When do Black-throated Green Warblers arrive in Virginia?
Black-throated Green Warblers arrive in Virginia in late August, peak in late September (6.7% of checklists), and most are gone by mid October.
When do Black-throated Green Warblers leave Virginia?
Most Black-throated Green Warblers have left Virginia by mid October, when reports fall below half their usual rate.
When is the best time to see a Black-throated Green Warbler in Virginia?
The Black-throated Green Warbler is reported most often in late September, on about 6.7% of Virginia checklists.
Where in Virginia are Black-throated Green Warblers seen most often?
By county, Manassas Park County, Dickenson County, and Greene County have the highest peak reporting rates for the Black-throated Green Warbler (counties with at least 200 checklists).