WhenToBird

Passerina caerulea · Cardinalidae

When Do Blue Grosbeaks Arrive in Nebraska?

Adult male Blue Grosbeak
Photo: John Rosford, CC BY 4.0 via iNaturalist

Blue Grosbeaks reach Nebraska in the second week of May, are common by late May, peak in early August (6.5% of checklists), and most are gone by early September.

When to look

First arrivalsMay 8-14the second week of May
Common byMay 22-31late May
PeakAug 1-7early August
Most gone bySep 1-7early September

Best: early August. First arrivals the second week of May; most are gone by early September. Peak: on about 6.5% of Nebraska checklists.

  1. Jannot usually seen
  2. Febnot usually seen
  3. Marnot usually seen
  4. Aprnot usually seen
  5. Maycommon
  6. Junpeak season
  7. Julpeak season
  8. Augpeak season
  9. Sepcommon
  10. Octnot usually seen
  11. Novnot usually seen
  12. Decnot usually seen

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

0%2%4%6%8%Jan 1-7: 0% of 4210 checklistsJan 8-14: 0% of 2891 checklistsJan 15-21: 0% of 2685 checklistsJan 22-31: 0% of 3834 checklistsFeb 1-7: 0% of 2803 checklistsFeb 8-14: 0% of 3134 checklistsFeb 15-21: 0% of 4508 checklistsFeb 22-28: 0% of 3238 checklistsMar 1-7: 0% of 3862 checklistsMar 8-14: 0% of 4894 checklistsMar 15-21: 0% of 5862 checklistsMar 22-31: 0% of 8598 checklistsApr 1-7: 0% of 5530 checklistsApr 8-14: 0% of 5528 checklistsApr 15-21: 0% of 6091 checklistsApr 22-30: 0.1% of 8661 checklistsMay 1-7: 0.1% of 9842 checklistsMay 8-14: 0.9% of 10044 checklistsMay 15-21: 2.3% of 8863 checklistsMay 22-31: 4.5% of 10207 checklistsJun 1-7: 5.2% of 4922 checklistsJun 8-14: 6.3% of 4054 checklistsJun 15-21: 5.7% of 3680 checklistsJun 22-30: 5.3% of 4349 checklistsJul 1-7: 5.7% of 3277 checklistsJul 8-14: 6.0% of 2803 checklistsJul 15-21: 6.1% of 2842 checklistsJul 22-31: 6.5% of 3920 checklistsAug 1-7: 6.3% of 2981 checklistsAug 8-14: 6.6% of 2819 checklistsAug 15-21: 5.7% of 3179 checklistsAug 22-31: 4.3% of 4599 checklistsSep 1-7: 2.2% of 3958 checklistsSep 8-14: 1.7% of 3460 checklistsSep 15-21: 0.6% of 3435 checklistsSep 22-30: 0.3% of 4975 checklistsOct 1-7: 0.2% of 3611 checklistsOct 8-14: 0.1% of 3605 checklistsOct 15-21: 0.1% of 3474 checklistsOct 22-31: 0.1% of 4352 checklistsNov 1-7: 0% of 3119 checklistsNov 8-14: 0% of 2887 checklistsNov 15-21: 0% of 2568 checklistsNov 22-30: 0% of 3506 checklistsDec 1-7: 0% of 2453 checklistsDec 8-14: 0% of 2756 checklistsDec 15-21: 0% of 3760 checklistsDec 22-31: 0% 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. Brown CountyBest early August · 16 checklists that week, 660 in all38%
  2. Dundy CountyBest mid June · 20 checklists that week, 623 in all37%
  3. Wayne CountyBest early August · 23 checklists that week, 1,960 in all33%
  4. Frontier CountyBest the second week of June · 11 checklists that week, 529 in all28%
  5. Thomas CountyBest late July · 22 checklists that week, 610 in all28%
  6. Banner CountyBest early July · 15 checklists that week, 689 in all27%

Best spots

Share of checklists at the peak
  1. Scotts Bluff National MonumentScotts Bluff County, best late July · 23 checklists that week, 507 in all48%
  2. Keystone Pond-Lake OgallalaKeith County, best mid May · 23 checklists that week, 339 in all27%
  3. Salt LakeLancaster County, best early August · 39 checklists that week, 2,553 in all26%
  4. Ogallala LakeKeith County, best early June · 27 checklists that week, 748 in all18%

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

Best time of day

In Nebraska, the Blue Grosbeak is most often listed on checklists started between 6 and 8 am (3.5% of those checklists).

0%2%4%6%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: 5.8% of 6945 checklists7 am: 2.6% of 19066 checklists8 am: 1.8% of 24661 checklists9 am: 1.6% of 23438 checklists10 am: 1.1% of 20424 checklists11 am: 1.2% of 16727 checklists12 pm: 0.9% of 14774 checklists1 pm: 0.8% of 14443 checklists2 pm: 0.8% of 14830 checklists3 pm: 0.8% of 14445 checklists4 pm: 1.0% of 13353 checklists5 pm: 1.1% of 10506 checklists6 pm: 1.5% of 9208 checklists7 pm: 2.4% 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%0%0%0%
February0%0%0%0%
March0%0%0%0%
April0%0%0%0.1%
May0.1%0.9%2.3%4.5%
June5.2%6.3%5.7%5.3%
July5.7%6.0%6.1%6.5%
August6.3%6.6%5.7%4.3%
September2.2%1.7%0.6%0.3%
October0.2%0.1%0.1%0.1%
November0%0%0%0%
December0%0%0%0%

Neighboring states

  • Kansas: arrives late April, 2 weeks earlier than Nebraska
  • South Dakota: arrives mid May, 1 week later than Nebraska
  • Iowa: arrives late May, 2 weeks later than Nebraska
  • Missouri: arrives mid April, 3 weeks earlier than Nebraska

Common questions

When do Blue Grosbeaks arrive in Nebraska?
Blue Grosbeaks reach Nebraska in the second week of May, are common by late May, peak in early August (6.5% of checklists), and most are gone by early September.
When do Blue Grosbeaks leave Nebraska?
Most Blue Grosbeaks have left Nebraska by early September, when reports fall below half their usual rate. Stragglers are still reported until the second week of September.
When is the best time to see a Blue Grosbeak in Nebraska?
The Blue Grosbeak is reported most often in early August, on about 6.5% of Nebraska checklists.
Where in Nebraska are Blue Grosbeaks seen most often?
By county, Brown County, Dundy County, and Wayne County have the highest peak reporting rates for the Blue Grosbeak (counties with at least 200 checklists).