WhenToBird

Nannopterum auritum · Phalacrocoracidae

When Do Double-crested Cormorants Arrive in Mississippi?

Adult Double-crested Cormorant
Photo: jubileej, CC0 1.0 via iNaturalist

Double-crested Cormorants are in Mississippi all year, but most are here in winter: numbers build from the second week of October, peak in the second week of January (26% of checklists), and fall back by early April. In the quietest week (the second week of June) they are still on about 3.5% of checklists.

When to look

Numbers buildOct 8-14the second week of October
PeakJan 8-14the second week of January
Fall back byApr 1-7early April
FewestJun 8-14the second week of June

Best: the second week of January. Here all year; numbers build from the second week of October and fall back by early April. Peak: on about 26% of Mississippi checklists.

  1. Janpeak season
  2. Febpeak season
  3. Marpeak season
  4. Aprcommon
  5. Mayuncommon
  6. Jununcommon
  7. Juluncommon
  8. Augcommon
  9. Sepcommon
  10. Octpeak season
  11. Novpeak season
  12. Decpeak season

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

0%10%20%30%Jan 1-7: 25% of 4836 checklistsJan 8-14: 27% of 3323 checklistsJan 15-21: 25% of 3400 checklistsJan 22-31: 24% of 4705 checklistsFeb 1-7: 24% of 3387 checklistsFeb 8-14: 22% of 3911 checklistsFeb 15-21: 19% of 4691 checklistsFeb 22-28: 23% of 3409 checklistsMar 1-7: 24% of 3276 checklistsMar 8-14: 24% of 3273 checklistsMar 15-21: 22% of 3552 checklistsMar 22-31: 21% of 5618 checklistsApr 1-7: 17% of 4432 checklistsApr 8-14: 15% of 4907 checklistsApr 15-21: 11% of 5239 checklistsApr 22-30: 9.7% of 7043 checklistsMay 1-7: 6.4% of 4597 checklistsMay 8-14: 4.6% of 4383 checklistsMay 15-21: 4.6% of 3088 checklistsMay 22-31: 3.9% of 3805 checklistsJun 1-7: 4.0% of 2658 checklistsJun 8-14: 3.0% of 2469 checklistsJun 15-21: 3.4% of 2112 checklistsJun 22-30: 4.1% of 2534 checklistsJul 1-7: 4.6% of 2099 checklistsJul 8-14: 5.9% of 1885 checklistsJul 15-21: 7.6% of 1811 checklistsJul 22-31: 6.7% of 2793 checklistsAug 1-7: 7.8% of 2045 checklistsAug 8-14: 9.9% of 2210 checklistsAug 15-21: 10% of 2437 checklistsAug 22-31: 12% of 3415 checklistsSep 1-7: 14% of 2837 checklistsSep 8-14: 12% of 2585 checklistsSep 15-21: 12% of 2870 checklistsSep 22-30: 13% of 3610 checklistsOct 1-7: 14% of 2938 checklistsOct 8-14: 15% of 3457 checklistsOct 15-21: 17% of 3168 checklistsOct 22-31: 23% of 3752 checklistsNov 1-7: 25% of 2847 checklistsNov 8-14: 26% of 2648 checklistsNov 15-21: 26% of 2599 checklistsNov 22-30: 25% of 3389 checklistsDec 1-7: 25% of 2419 checklistsDec 8-14: 26% of 2526 checklistsDec 15-21: 22% of 2966 checklistsDec 22-31: 23% of 4466 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 Mississippi 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 Mississippi

Best counties

Share of checklists at the peak
  1. Yazoo CountyBest late September · 13 checklists that week, 440 in all70%
  2. Clay CountyBest late January · 18 checklists that week, 531 in all67%
  3. Chickasaw CountyBest early September · 13 checklists that week, 335 in all64%
  4. Monroe CountyBest late October · 14 checklists that week, 581 in all62%
  5. Panola CountyBest late August · 23 checklists that week, 1,311 in all57%
  6. Yalobusha CountyBest early October · 10 checklists that week, 368 in all53%

Best spots

Share of checklists at the peak
  1. Rhodes PointHarrison County, best late October · 30 checklists that week, 724 in all95%
  2. Blue LakeJackson County, best early March · 37 checklists that week, 1,885 in all90%
  3. Bellefontaine Point Coastal Reserve (northwest)Jackson County, best late December · 23 checklists that week, 404 in all90%

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

Best time of day

In Mississippi, the Double-crested Cormorant is most often listed on checklists started between 2 and 4 pm (20% of those checklists).

0%10%20%30%12 am: too few checklists (54) to judge1 am: too few checklists (48) to judge2 am: too few checklists (28) to judge3 am: too few checklists (60) to judge4 am: too few checklists (114) to judge5 am: too few checklists (1139) to judge6 am: 14% of 9054 checklists7 am: 17% of 18481 checklists8 am: 18% of 17525 checklists9 am: 17% of 15482 checklists10 am: 18% of 14380 checklists11 am: 18% of 12728 checklists12 pm: 18% of 11009 checklists1 pm: 19% of 10651 checklists2 pm: 20% of 10787 checklists3 pm: 19% of 11221 checklists4 pm: 13% of 11861 checklists5 pm: 8.6% of 8854 checklists6 pm: 6.3% of 6018 checklists7 pm: too few checklists (2387) to judge8 pm: too few checklists (314) to judge9 pm: too few checklists (114) to judge10 pm: too few checklists (63) to judge11 pm: too few checklists (48) 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
January25%27%25%24%
February24%22%19%23%
March24%24%22%21%
April17%15%11%9.7%
May6.4%4.6%4.6%3.9%
June4.0%3.0%3.4%4.1%
July4.6%5.9%7.6%6.7%
August7.8%9.9%10%12%
September14%12%12%13%
October14%15%17%23%
November25%26%26%25%
December25%26%22%23%

Neighboring states

  • Alabama: arrives mid October, 1 week later than Mississippi
  • Louisiana: arrives mid October, 1 week later than Mississippi
  • Arkansas: arrives the second week of July, 12 weeks earlier than Mississippi
  • Georgia: arrives late October, 2 weeks later than Mississippi

Common questions

When do Double-crested Cormorants arrive in Mississippi?
Double-crested Cormorants are in Mississippi all year, but most are here in winter: numbers build from the second week of October, peak in the second week of January (26% of checklists), and fall back by early April. In the quietest week (the second week of June) they are still on about 3.5% of checklists.
When do Double-crested Cormorants leave Mississippi?
Double-crested Cormorants never fully leave Mississippi: numbers fall back below half their usual rate by early April, but some are still reported in every week, about 3.5% of checklists at the low.
When is the best time to see a Double-crested Cormorant in Mississippi?
The Double-crested Cormorant is reported most often in the second week of January, on about 26% of Mississippi checklists.
Where in Mississippi are Double-crested Cormorants seen most often?
By county, Yazoo County, Clay County, and Chickasaw County have the highest peak reporting rates for the Double-crested Cormorant (counties with at least 200 checklists).