WhenToBird

Sturnus vulgaris · Sturnidae

When Do European Starlings Arrive in Wyoming?

Adult female European Starling
Photo: egorbirder, CC BY 4.0 via iNaturalist

European Starlings are in Wyoming all year, but most are here in spring: numbers build from the second week of February, peak in mid March (32% of checklists), and fall back by early June. In the quietest week (mid July) they are still on about 10% of checklists.

When to look

Numbers buildFeb 8-14the second week of February
PeakMar 15-21mid March
Fall back byJun 1-7early June
FewestJul 15-21mid July

Best: mid March. Here all year; numbers build from the second week of February and fall back by early June. Peak: on about 32% of Wyoming checklists.

  1. Jancommon
  2. Febpeak season
  3. Marpeak season
  4. Aprpeak season
  5. Maypeak season
  6. Juncommon
  7. Juluncommon
  8. Augcommon
  9. Sepcommon
  10. Octpeak season
  11. Novpeak season
  12. Deccommon

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

0%10%20%30%40%Jan 1-7: 23% of 2543 checklistsJan 8-14: 23% of 2114 checklistsJan 15-21: 24% of 1984 checklistsJan 22-31: 20% of 2605 checklistsFeb 1-7: 23% of 1940 checklistsFeb 8-14: 20% of 1954 checklistsFeb 15-21: 25% of 2575 checklistsFeb 22-28: 25% of 1932 checklistsMar 1-7: 28% of 2486 checklistsMar 8-14: 32% of 2535 checklistsMar 15-21: 32% of 2726 checklistsMar 22-31: 32% of 4349 checklistsApr 1-7: 30% of 3300 checklistsApr 8-14: 31% of 3500 checklistsApr 15-21: 30% of 3701 checklistsApr 22-30: 30% of 5887 checklistsMay 1-7: 30% of 5341 checklistsMay 8-14: 30% of 6910 checklistsMay 15-21: 28% of 6884 checklistsMay 22-31: 25% of 10652 checklistsJun 1-7: 21% of 6807 checklistsJun 8-14: 18% of 6714 checklistsJun 15-21: 15% of 6708 checklistsJun 22-30: 14% of 8160 checklistsJul 1-7: 13% of 5755 checklistsJul 8-14: 9.9% of 5379 checklistsJul 15-21: 11% of 5299 checklistsJul 22-31: 10% of 6830 checklistsAug 1-7: 12% of 4581 checklistsAug 8-14: 13% of 4625 checklistsAug 15-21: 15% of 4466 checklistsAug 22-31: 16% of 6562 checklistsSep 1-7: 17% of 4543 checklistsSep 8-14: 17% of 4652 checklistsSep 15-21: 19% of 4186 checklistsSep 22-30: 19% of 5301 checklistsOct 1-7: 22% of 3248 checklistsOct 8-14: 24% of 3010 checklistsOct 15-21: 26% of 2624 checklistsOct 22-31: 27% of 3170 checklistsNov 1-7: 25% of 2110 checklistsNov 8-14: 21% of 2153 checklistsNov 15-21: 22% of 1971 checklistsNov 22-30: 21% of 2136 checklistsDec 1-7: 22% of 1646 checklistsDec 8-14: 23% of 1609 checklistsDec 15-21: 23% of 1954 checklistsDec 22-31: 21% of 2392 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 Wyoming 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 Wyoming

Best counties

Share of checklists at the peak
  1. Campbell CountyBest the second week of September · 69 checklists that week, 2,801 in all78%
  2. Big Horn CountyBest mid November · 11 checklists that week, 2,023 in all58%
  3. Hot Springs CountyBest mid April · 16 checklists that week, 1,345 in all56%
  4. Goshen CountyBest late December · 20 checklists that week, 1,920 in all53%
  5. Uinta CountyBest early March · 23 checklists that week, 1,881 in all49%
  6. Fremont CountyBest late May · 1152 checklists that week, 27,707 in all48%

Best spots

Share of checklists at the peak
  1. Glenrock ParkConverse County, best late May · 24 checklists that week, 380 in all98%
  2. Camplex ParkCampbell County, best mid September · 26 checklists that week, 659 in all95%
  3. Hudson DrawFremont County, best mid April · 46 checklists that week, 2,803 in all90%
  4. Town of Lander ParkFremont County, best the second week of May · 48 checklists that week, 894 in all87%

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

Best time of day

In Wyoming, the European Starling is most often listed on checklists started between 7 and 9 am (30% of those checklists).

0%10%20%30%40%12 am: too few checklists (59) to judge1 am: too few checklists (76) to judge2 am: too few checklists (86) to judge3 am: too few checklists (79) to judge4 am: too few checklists (326) to judge5 am: too few checklists (2271) to judge6 am: 29% of 8808 checklists7 am: 30% of 18458 checklists8 am: 30% of 22143 checklists9 am: 24% of 21499 checklists10 am: 19% of 19425 checklists11 am: 15% of 16017 checklists12 pm: 14% of 13868 checklists1 pm: 14% of 12984 checklists2 pm: 15% of 12605 checklists3 pm: 18% of 11821 checklists4 pm: 20% of 10571 checklists5 pm: 23% of 8746 checklists6 pm: 22% of 6707 checklists7 pm: 18% of 4890 checklists8 pm: too few checklists (2323) to judge9 pm: too few checklists (554) to judge10 pm: too few checklists (134) to judge11 pm: too few checklists (59) 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
January23%23%24%20%
February23%20%25%25%
March28%32%32%32%
April30%31%30%30%
May30%30%28%25%
June21%18%15%14%
July13%9.9%11%10%
August12%13%15%16%
September17%17%19%19%
October22%24%26%27%
November25%21%22%21%
December22%23%23%21%

Neighboring states

  • Colorado: arrives late February, 2 weeks later than Wyoming
  • Utah: year-round, peaks the second week of January
  • Montana: arrives early March, 3 weeks later than Wyoming
  • Idaho: year-round, peaks the second week of May

Common questions

When do European Starlings arrive in Wyoming?
European Starlings are in Wyoming all year, but most are here in spring: numbers build from the second week of February, peak in mid March (32% of checklists), and fall back by early June. In the quietest week (mid July) they are still on about 10% of checklists.
When do European Starlings leave Wyoming?
European Starlings never fully leave Wyoming: numbers fall back below half their usual rate by early June, but some are still reported in every week, about 10% of checklists at the low.
When is the best time to see a European Starling in Wyoming?
The European Starling is reported most often in mid March, on about 32% of Wyoming checklists.
Where in Wyoming are European Starlings seen most often?
By county, Campbell County, Big Horn County, and Hot Springs County have the highest peak reporting rates for the European Starling (counties with at least 200 checklists).