WhenToBird

Geothlypis philadelphia · Parulidae

When Do Mourning Warblers Arrive in New York?

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

Mourning Warblers mostly pass through New York: they arrive in the second week of May, peak in late May (2.6% of checklists), and most are gone by the second week of July.

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 byJul 8-14the second week of July

Best: late May. First arrivals the second week of May; most are gone by the second week of July. Peak: on about 2.6% of New York checklists.

  1. Jannot usually seen
  2. Febnot usually seen
  3. Marnot usually seen
  4. Aprnot usually seen
  5. Maypeak season
  6. Junpeak season
  7. Julcommon
  8. Augrare
  9. Seprare
  10. Octrare
  11. Novnot usually seen
  12. Decnot usually seen

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

0%1%2%3%4%Jan 1-7: 0% of 66410 checklistsJan 8-14: 0% of 49310 checklistsJan 15-21: 0% of 49919 checklistsJan 22-31: 0% of 62513 checklistsFeb 1-7: 0% of 43526 checklistsFeb 8-14: 0% of 49753 checklistsFeb 15-21: 0% of 65147 checklistsFeb 22-28: 0% of 50173 checklistsMar 1-7: 0% of 50325 checklistsMar 8-14: 0% of 55371 checklistsMar 15-21: 0% of 56293 checklistsMar 22-31: 0% of 82677 checklistsApr 1-7: 0% of 65295 checklistsApr 8-14: 0% of 73080 checklistsApr 15-21: 0% of 73857 checklistsApr 22-30: 0% of 106093 checklistsMay 1-7: 0.1% of 102772 checklistsMay 8-14: 0.4% of 110051 checklistsMay 15-21: 2.1% of 94797 checklistsMay 22-31: 3.1% of 101272 checklistsJun 1-7: 2.4% of 59471 checklistsJun 8-14: 1.6% of 55497 checklistsJun 15-21: 1.6% of 51761 checklistsJun 22-30: 1.4% of 59219 checklistsJul 1-7: 1.2% of 48226 checklistsJul 8-14: 0.8% of 42315 checklistsJul 15-21: 0.4% of 40637 checklistsJul 22-31: 0.3% of 57183 checklistsAug 1-7: 0.3% of 40461 checklistsAug 8-14: 0.3% of 39880 checklistsAug 15-21: 0.3% of 41146 checklistsAug 22-31: 0.3% of 63381 checklistsSep 1-7: 0.4% of 48640 checklistsSep 8-14: 0.4% of 47882 checklistsSep 15-21: 0.4% of 49063 checklistsSep 22-30: 0.2% of 57906 checklistsOct 1-7: 0.1% of 48447 checklistsOct 8-14: 0.1% of 51901 checklistsOct 15-21: 0.1% of 46717 checklistsOct 22-31: 0.1% of 61992 checklistsNov 1-7: 0.1% of 44593 checklistsNov 8-14: 0% of 42566 checklistsNov 15-21: 0% of 39675 checklistsNov 22-30: 0% of 51197 checklistsDec 1-7: 0% of 36567 checklistsDec 8-14: 0% of 37254 checklistsDec 15-21: 0% of 43754 checklistsDec 22-31: 0% of 62470 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 New York 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 New York

Best counties

Share of checklists at the peak
  1. Chenango CountyBest early June · 352 checklists that week, 10,785 in all20%
  2. Cortland CountyBest early June · 288 checklists that week, 10,206 in all17%
  3. Lewis CountyBest late June · 341 checklists that week, 5,920 in all13%
  4. Chautauqua CountyBest early June · 785 checklists that week, 35,772 in all12%
  5. Otsego CountyBest early June · 398 checklists that week, 15,810 in all11%
  6. Wyoming CountyBest late May · 556 checklists that week, 11,458 in all7.7%

Best spots

Share of checklists at the peak
  1. Canadaway Creek WmaChautauqua County, best late May · 36 checklists that week, 359 in all66%
  2. Bryant ParkNew York County, best the second week of June · 122 checklists that week, 4,783 in all61%
  3. Whiskey HollowOnondaga County, best early June · 25 checklists that week, 430 in all61%
  4. Shindagin Hollow State ForestTompkins County, best the second week of July · 26 checklists that week, 430 in all57%
  5. South Cove (Tribeca)New York County, best early October · 47 checklists that week, 266 in all41%

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

Best time of day

In New York, the Mourning Warbler is most often listed on checklists started between 6 and 8 am (0.9% of those checklists).

0%0.5%1%1.5%12 am: too few checklists (1146) to judge1 am: too few checklists (1055) to judge2 am: too few checklists (1121) to judge3 am: too few checklists (1353) to judge4 am: too few checklists (4785) to judge5 am: too few checklists (32052) to judge6 am: 1.2% of 124869 checklists7 am: 0.8% of 298506 checklists8 am: 0.6% of 337334 checklists9 am: 0.5% of 307787 checklists10 am: 0.4% of 270801 checklists11 am: 0.3% of 233238 checklists12 pm: 0.2% of 213830 checklists1 pm: 0.2% of 193321 checklists2 pm: 0.2% of 180741 checklists3 pm: 0.2% of 170348 checklists4 pm: 0.2% of 147224 checklists5 pm: 0.3% of 111962 checklists6 pm: 0.2% of 78261 checklists7 pm: too few checklists (44425) to judge8 pm: too few checklists (15648) to judge9 pm: too few checklists (4795) to judge10 pm: too few checklists (2454) to judge11 pm: too few checklists (1378) 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%
May0.1%0.4%2.1%3.1%
June2.4%1.6%1.6%1.4%
July1.2%0.8%0.4%0.3%
August0.3%0.3%0.3%0.3%
September0.4%0.4%0.4%0.2%
October0.1%0.1%0.1%0.1%
November0.1%0%0%0%
December0%0%0%0%

Neighboring states

Common questions

When do Mourning Warblers arrive in New York?
Mourning Warblers mostly pass through New York: they arrive in the second week of May, peak in late May (2.6% of checklists), and most are gone by the second week of July.
When do Mourning Warblers leave New York?
Most Mourning Warblers have left New York by the second week of July, when reports fall below half their usual rate.
When is the best time to see a Mourning Warbler in New York?
The Mourning Warbler is reported most often in late May, on about 2.6% of New York checklists.
Where in New York are Mourning Warblers seen most often?
By county, Chenango County, Cortland County, and Lewis County have the highest peak reporting rates for the Mourning Warbler (counties with at least 200 checklists).