WhenToBird

Plegadis falcinellus · Threskiornithidae

When Do Glossy Ibises Arrive in Virginia?

Adult Glossy Ibis
Photo: fede2cr, CC BY 4.0 via iNaturalist

Glossy Ibises arrive in Virginia in the second week of April, peak in the second week of May (1.4% of checklists), and most are gone by late August.

When to look

First arrivalsApr 8-14the second week of April
Common byApr 8-14the second week of April
PeakMay 8-14the second week of May
Most gone byAug 22-31late August

Best: the second week of May. First arrivals the second week of April; most are gone by late August. Peak: on about 1.4% of Virginia checklists.

  1. Jannot usually seen
  2. Febnot usually seen
  3. Marrare
  4. Aprpeak season
  5. Maypeak season
  6. Junpeak season
  7. Julpeak season
  8. Augcommon
  9. Sepuncommon
  10. Octrare
  11. Novnot usually seen
  12. Decnot usually seen

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

0%0.5%1%1.5%2%Jan 1-7: 0.1% of 32817 checklistsJan 8-14: 0% of 25111 checklistsJan 15-21: 0.1% 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% of 25901 checklistsMar 15-21: 0.1% of 26747 checklistsMar 22-31: 0.1% of 40819 checklistsApr 1-7: 0.4% of 31351 checklistsApr 8-14: 0.8% of 33239 checklistsApr 15-21: 0.9% of 37284 checklistsApr 22-30: 1.1% of 54364 checklistsMay 1-7: 1.5% of 47698 checklistsMay 8-14: 1.2% of 46174 checklistsMay 15-21: 1.3% of 36444 checklistsMay 22-31: 1.1% of 43203 checklistsJun 1-7: 1.0% of 28503 checklistsJun 8-14: 1.1% of 25485 checklistsJun 15-21: 1.0% of 23728 checklistsJun 22-30: 1.1% of 28785 checklistsJul 1-7: 1.3% of 22294 checklistsJul 8-14: 1.1% of 20481 checklistsJul 15-21: 1.4% of 18914 checklistsJul 22-31: 0.9% of 26976 checklistsAug 1-7: 1.0% of 19555 checklistsAug 8-14: 1.0% of 18744 checklistsAug 15-21: 0.7% of 18721 checklistsAug 22-31: 0.5% of 28763 checklistsSep 1-7: 0.5% of 23594 checklistsSep 8-14: 0.3% of 22581 checklistsSep 15-21: 0.3% of 23036 checklistsSep 22-30: 0.2% of 29687 checklistsOct 1-7: 0.2% of 24321 checklistsOct 8-14: 0.1% of 23946 checklistsOct 15-21: 0.1% of 22191 checklistsOct 22-31: 0.1% of 30161 checklistsNov 1-7: 0.1% of 21431 checklistsNov 8-14: 0.1% of 22758 checklistsNov 15-21: 0.1% of 19988 checklistsNov 22-30: 0.1% of 27665 checklistsDec 1-7: 0.1% of 19324 checklistsDec 8-14: 0.1% of 20316 checklistsDec 15-21: 0.1% of 25675 checklistsDec 22-31: 0.1% 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. Accomack CountyBest mid June · 547 checklists that week, 43,278 in all34%
  2. Surry CountyBest late August · 93 checklists that week, 2,669 in all12%
  3. Virginia Beach CountyBest mid April · 1524 checklists that week, 70,485 in all8.9%
  4. Northampton CountyBest the second week of August · 336 checklists that week, 27,227 in all6.4%
  5. Poquoson CountyBest late April · 144 checklists that week, 2,669 in all4.8%
  6. Portsmouth CountyBest late August · 60 checklists that week, 3,085 in all4.5%

Best spots

Share of checklists at the peak
  1. Chincoteague National Wildlife RefugeAccomack County, best mid June · 36 checklists that week, 2,784 in all88%
  2. Chincoteague National Wildlife Refuge (northeast)Accomack County, best the second week of May · 64 checklists that week, 1,094 in all86%
  3. Princess Anne Wildlife Management Area (north)Virginia Beach County, best mid April · 41 checklists that week, 697 in all72%
  4. Chincoteague National Wildlife Refuge (north)Accomack County, best the second week of June · 43 checklists that week, 2,019 in all69%
  5. Princess Anne Wildlife Management AreaVirginia Beach County, best mid April · 32 checklists that week, 878 in all55%
  6. Bush Island CoveVirginia Beach County, best mid April · 107 checklists that week, 6,303 in all44%

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

Best time of day

In Virginia, the Glossy Ibis is most often listed on checklists started between 3 and 5 pm (0.7% of those checklists).

0%0.5%1%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: 0.9% of 64788 checklists7 am: 0.4% of 169128 checklists8 am: 0.4% of 180748 checklists9 am: 0.4% of 153462 checklists10 am: 0.4% of 128966 checklists11 am: 0.4% of 104204 checklists12 pm: 0.3% of 91604 checklists1 pm: 0.3% of 85547 checklists2 pm: 0.4% of 82355 checklists3 pm: 0.7% of 82265 checklists4 pm: 0.7% of 76714 checklists5 pm: 0.7% of 56782 checklists6 pm: 0.8% 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
January0.1%0%0.1%0%
February0%0%0%0%
March0%0%0.1%0.1%
April0.4%0.8%0.9%1.1%
May1.5%1.2%1.3%1.1%
June1.0%1.1%1.0%1.1%
July1.3%1.1%1.4%0.9%
August1.0%1.0%0.7%0.5%
September0.5%0.3%0.3%0.2%
October0.2%0.1%0.1%0.1%
November0.1%0.1%0.1%0.1%
December0.1%0.1%0.1%0.1%

Neighboring states

  • Maryland: arrives the second week of April, in the same week than Virginia
  • Delaware: arrives late March, 2 weeks earlier than Virginia
  • New Jersey: arrives early April, 1 week earlier than Virginia
  • New York: arrives late April, 2 weeks later than Virginia

Common questions

When do Glossy Ibises arrive in Virginia?
Glossy Ibises arrive in Virginia in the second week of April, peak in the second week of May (1.4% of checklists), and most are gone by late August.
When do Glossy Ibises leave Virginia?
Most Glossy Ibises have left Virginia by late August, when reports fall below half their usual rate.
When is the best time to see a Glossy Ibis in Virginia?
The Glossy Ibis is reported most often in the second week of May, on about 1.4% of Virginia checklists.
Where in Virginia are Glossy Ibises seen most often?
By county, Accomack County, Surry County, and Virginia Beach County have the highest peak reporting rates for the Glossy Ibis (counties with at least 200 checklists).