WhenToBird

Quiscalus mexicanus · Icteridae

When Do Great-tailed Grackles Arrive in Nebraska?

Adult female Great-tailed Grackle
Photo: Anthony Batista, CC BY 4.0 via iNaturalist

Great-tailed Grackles arrive in Nebraska in mid March, peak in late May (2.9% of checklists), and most are gone by the second week of August.

When to look

First arrivalsMar 15-21mid March
Common byMar 15-21mid March
PeakMay 22-31late May
Most gone byAug 8-14the second week of August

Best: late May. First arrivals mid March; most are gone by the second week of August. Peak: on about 2.9% of Nebraska checklists.

  1. Janrare
  2. Febrare
  3. Marcommon
  4. Aprpeak season
  5. Maypeak season
  6. Junpeak season
  7. Julpeak season
  8. Augcommon
  9. Sepuncommon
  10. Octuncommon
  11. Novrare
  12. Decrare

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

0%1%2%3%4%Jan 1-7: 0.5% of 4210 checklistsJan 8-14: 0.4% of 2891 checklistsJan 15-21: 0.1% of 2685 checklistsJan 22-31: 0.2% of 3834 checklistsFeb 1-7: 0.4% of 2803 checklistsFeb 8-14: 0.2% of 3134 checklistsFeb 15-21: 0.2% of 4508 checklistsFeb 22-28: 0.3% of 3238 checklistsMar 1-7: 0.5% of 3862 checklistsMar 8-14: 0.9% of 4894 checklistsMar 15-21: 0.9% of 5862 checklistsMar 22-31: 1.7% of 8598 checklistsApr 1-7: 1.5% of 5530 checklistsApr 8-14: 1.9% of 5528 checklistsApr 15-21: 2.4% of 6091 checklistsApr 22-30: 2.7% of 8661 checklistsMay 1-7: 2.9% of 9842 checklistsMay 8-14: 2.7% of 10044 checklistsMay 15-21: 3.2% of 8863 checklistsMay 22-31: 2.9% of 10207 checklistsJun 1-7: 2.5% of 4922 checklistsJun 8-14: 2.7% of 4054 checklistsJun 15-21: 3.1% of 3680 checklistsJun 22-30: 2.5% of 4349 checklistsJul 1-7: 2.6% of 3277 checklistsJul 8-14: 2.2% of 2803 checklistsJul 15-21: 1.9% of 2842 checklistsJul 22-31: 1.3% of 3920 checklistsAug 1-7: 1.4% of 2981 checklistsAug 8-14: 1.5% of 2819 checklistsAug 15-21: 1.4% of 3179 checklistsAug 22-31: 0.5% of 4599 checklistsSep 1-7: 0.5% of 3958 checklistsSep 8-14: 0.6% of 3460 checklistsSep 15-21: 0.6% of 3435 checklistsSep 22-30: 0.9% of 4975 checklistsOct 1-7: 0.7% of 3611 checklistsOct 8-14: 0.4% of 3605 checklistsOct 15-21: 0.5% of 3474 checklistsOct 22-31: 0.5% of 4352 checklistsNov 1-7: 0.4% of 3119 checklistsNov 8-14: 0.4% of 2887 checklistsNov 15-21: 0.4% of 2568 checklistsNov 22-30: 0.4% of 3506 checklistsDec 1-7: 0.4% of 2453 checklistsDec 8-14: 0.5% of 2756 checklistsDec 15-21: 0.5% of 3760 checklistsDec 22-31: 0.3% of 3746 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 Nebraska 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 Nebraska

Best counties

Share of checklists at the peak
  1. Perkins CountyBest the second week of May · 14 checklists that week, 297 in all37%
  2. Deuel CountyBest the second week of May · 19 checklists that week, 479 in all36%
  3. Logan CountyBest the second week of June · 12 checklists that week, 281 in all32%
  4. Butler CountyBest late May · 11 checklists that week, 589 in all30%
  5. York CountyBest the second week of June · 36 checklists that week, 1,922 in all27%
  6. Phelps CountyBest the second week of August · 16 checklists that week, 836 in all26%

Best spots

Share of checklists at the peak
  1. Jack Sinn Memorial Wildlife Management Area (North Fork Rock Creek)Lancaster County, best late April · 20 checklists that week, 228 in all30%
  2. Oliver Reservoir State Recreation AreaKimball County, best the second week of May · 20 checklists that week, 597 in all27%
  3. Salt LakeLancaster County, best late April · 131 checklists that week, 2,553 in all26%
  4. North Lake Basin Wildlife Management AreaSeward County, best mid May · 37 checklists that week, 438 in all23%

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

Best time of day

In Nebraska, the Great-tailed Grackle is most often listed on checklists started between 6 and 8 pm (2.3% of those checklists).

0%1%2%3%12 am: too few checklists (60) to judge1 am: too few checklists (70) to judge2 am: too few checklists (74) to judge3 am: too few checklists (97) to judge4 am: too few checklists (318) to judge5 am: too few checklists (1382) to judge6 am: 1.9% of 6945 checklists7 am: 1.5% of 19066 checklists8 am: 1.2% of 24661 checklists9 am: 1.4% of 23438 checklists10 am: 1.3% of 20424 checklists11 am: 1.5% of 16727 checklists12 pm: 1.4% of 14774 checklists1 pm: 1.2% of 14443 checklists2 pm: 1.3% of 14830 checklists3 pm: 1.5% of 14445 checklists4 pm: 1.4% of 13353 checklists5 pm: 1.8% of 10506 checklists6 pm: 2.5% of 9208 checklists7 pm: 1.9% of 6334 checklists8 pm: too few checklists (2406) to judge9 pm: too few checklists (531) to judge10 pm: too few checklists (201) to judge11 pm: too few checklists (82) 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
January0.5%0.4%0.1%0.2%
February0.4%0.2%0.2%0.3%
March0.5%0.9%0.9%1.7%
April1.5%1.9%2.4%2.7%
May2.9%2.7%3.2%2.9%
June2.5%2.7%3.1%2.5%
July2.6%2.2%1.9%1.3%
August1.4%1.5%1.4%0.5%
September0.5%0.6%0.6%0.9%
October0.7%0.4%0.5%0.5%
November0.4%0.4%0.4%0.4%
December0.4%0.5%0.5%0.3%

Neighboring states

  • Kansas: arrives early March, 2 weeks earlier than Nebraska
  • Iowa: arrives the second week of March, 1 week earlier than Nebraska
  • Oklahoma: arrives mid March, in the same week than Nebraska
  • Colorado: arrives the second week of March, 1 week earlier than Nebraska

Common questions

When do Great-tailed Grackles arrive in Nebraska?
Great-tailed Grackles arrive in Nebraska in mid March, peak in late May (2.9% of checklists), and most are gone by the second week of August.
When do Great-tailed Grackles leave Nebraska?
Most Great-tailed Grackles have left Nebraska by the second week of August, when reports fall below half their usual rate. Stragglers are still reported until mid August.
When is the best time to see a Great-tailed Grackle in Nebraska?
The Great-tailed Grackle is reported most often in late May, on about 2.9% of Nebraska checklists.
Where in Nebraska are Great-tailed Grackles seen most often?
By county, Perkins County, Deuel County, and Logan County have the highest peak reporting rates for the Great-tailed Grackle (counties with at least 200 checklists).