WhenToBird

Nannopterum brasilianum · Phalacrocoracidae

When Do Neotropic Cormorants Arrive in Texas?

Adult Neotropic Cormorant
Photo: Ricard Busquets Reverte, CC BY 4.0 via iNaturalist

The Neotropic Cormorant is in Texas all year. It turns up on about 11% of checklists at its peak (mid April) and on 6.6% in its quietest week (mid May).

When to look

PresentAll year
Peak weekApr 15-21mid April
Quietest weekMay 15-21mid May

Best: mid April. Here all year. Peak: on about 11% of Texas checklists.

  1. Janpeak season
  2. Febpeak season
  3. Marpeak season
  4. Aprpeak season
  5. Maypeak season
  6. Junpeak season
  7. Julpeak season
  8. Augpeak season
  9. Seppeak season
  10. Octpeak season
  11. Novpeak season
  12. Decpeak season

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

0%5%10%15%Jan 1-7: 9.9% of 66038 checklistsJan 8-14: 9.5% of 52445 checklistsJan 15-21: 9.2% of 52985 checklistsJan 22-31: 9.3% of 71020 checklistsFeb 1-7: 9.5% of 52306 checklistsFeb 8-14: 9.4% of 55887 checklistsFeb 15-21: 7.7% of 69016 checklistsFeb 22-28: 10% of 52998 checklistsMar 1-7: 10% of 50836 checklistsMar 8-14: 10% of 51749 checklistsMar 15-21: 10% of 53731 checklistsMar 22-31: 9.9% of 82049 checklistsApr 1-7: 9.6% of 65854 checklistsApr 8-14: 10% of 78434 checklistsApr 15-21: 11% of 92302 checklistsApr 22-30: 10% of 122878 checklistsMay 1-7: 7.8% of 74592 checklistsMay 8-14: 6.4% of 61008 checklistsMay 15-21: 6.8% of 43365 checklistsMay 22-31: 6.8% of 52736 checklistsJun 1-7: 7.1% of 31643 checklistsJun 8-14: 7.3% of 30131 checklistsJun 15-21: 8.0% of 26802 checklistsJun 22-30: 7.9% of 32822 checklistsJul 1-7: 8.1% of 27213 checklistsJul 8-14: 8.5% of 24555 checklistsJul 15-21: 8.6% of 24146 checklistsJul 22-31: 8.9% of 34536 checklistsAug 1-7: 9.2% of 25764 checklistsAug 8-14: 8.3% of 26347 checklistsAug 15-21: 8.3% of 28431 checklistsAug 22-31: 7.7% of 42838 checklistsSep 1-7: 7.8% of 35070 checklistsSep 8-14: 7.7% of 33893 checklistsSep 15-21: 8.1% of 32572 checklistsSep 22-30: 8.1% of 43771 checklistsOct 1-7: 8.4% of 34143 checklistsOct 8-14: 8.5% of 37563 checklistsOct 15-21: 8.9% of 36263 checklistsOct 22-31: 9.2% of 49170 checklistsNov 1-7: 9.6% of 43301 checklistsNov 8-14: 10% of 48744 checklistsNov 15-21: 9.4% of 42213 checklistsNov 22-30: 8.8% of 54455 checklistsDec 1-7: 9.4% of 40166 checklistsDec 8-14: 9.4% of 41035 checklistsDec 15-21: 9.7% of 46983 checklistsDec 22-31: 9.1% of 73015 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 Texas 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 Texas

Best counties

Share of checklists at the peak
  1. Rains CountyBest the second week of September · 16 checklists that week, 1,265 in all61%
  2. Freestone CountyBest late August · 42 checklists that week, 1,088 in all53%
  3. McMullen CountyBest early September · 18 checklists that week, 3,965 in all47%
  4. Navarro CountyBest late July · 10 checklists that week, 1,319 in all46%
  5. Orange CountyBest early December · 51 checklists that week, 3,557 in all44%
  6. Refugio CountyBest mid July · 17 checklists that week, 3,809 in all41%

Best spots

Share of checklists at the peak
  1. Old River CoveOrange County, best early January · 22 checklists that week, 276 in all95%
  2. Calaveras Lake ParkBexar County, best late January · 32 checklists that week, 777 in all92%
  3. Sunset LakeSan Patricio County, best mid May · 28 checklists that week, 2,056 in all90%
  4. WFDD Hike & Bike TrailFort Bend County, best early September · 21 checklists that week, 590 in all89%

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

Best time of day

In Texas, the Neotropic Cormorant is most often listed on checklists started between 6 and 8 am (11% of those checklists).

0%5%10%15%12 am: too few checklists (898) to judge1 am: too few checklists (756) to judge2 am: too few checklists (663) to judge3 am: too few checklists (741) to judge4 am: too few checklists (1537) to judge5 am: too few checklists (6113) to judge6 am: 11% of 74687 checklists7 am: 10% of 285131 checklists8 am: 9.9% of 329960 checklists9 am: 8.9% of 267889 checklists10 am: 9.1% of 218205 checklists11 am: 9.2% of 178879 checklists12 pm: 9.0% of 153722 checklists1 pm: 9.3% of 144662 checklists2 pm: 9.5% of 138578 checklists3 pm: 9.0% of 136878 checklists4 pm: 8.3% of 137550 checklists5 pm: 7.1% of 113599 checklists6 pm: 6.8% of 81743 checklists7 pm: 5.0% of 53396 checklists8 pm: too few checklists (17221) to judge9 pm: too few checklists (4048) to judge10 pm: too few checklists (1965) to judge11 pm: too few checklists (990) 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
January9.9%9.5%9.2%9.3%
February9.5%9.4%7.7%10%
March10%10%10%9.9%
April9.6%10%11%10%
May7.8%6.4%6.8%6.8%
June7.1%7.3%8.0%7.9%
July8.1%8.5%8.6%8.9%
August9.2%8.3%8.3%7.7%
September7.8%7.7%8.1%8.1%
October8.4%8.5%8.9%9.2%
November9.6%10%9.4%8.8%
December9.4%9.4%9.7%9.1%

Neighboring states

  • Louisiana: year-round, peaks late August
  • Oklahoma: summer visitor, peaks the second week of August
  • Mississippi: summer visitor, peaks the second week of August
  • New Mexico: summer visitor, peaks early April

Common questions

When do Neotropic Cormorants arrive in Texas?
The Neotropic Cormorant is in Texas all year. It turns up on about 11% of checklists at its peak (mid April) and on 6.6% in its quietest week (mid May).
When do Neotropic Cormorants leave Texas?
The Neotropic Cormorant does not leave Texas: it is reported all year, from 6.6% of checklists in mid May to 11% in mid April.
When is the best time to see a Neotropic Cormorant in Texas?
The Neotropic Cormorant is reported most often in mid April, on about 11% of Texas checklists.
Where in Texas are Neotropic Cormorants seen most often?
By county, Rains County, Freestone County, and McMullen County have the highest peak reporting rates for the Neotropic Cormorant (counties with at least 200 checklists).