WhenToBird

Corvus corax · Corvidae

When Do Common Ravens Arrive in Wyoming?

Adult Common Raven
Photo: Mila C., CC BY 4.0 via iNaturalist

The Common Raven is in Wyoming all year. It turns up on about 28% of checklists at its peak (mid September) and on 22% in its quietest week (the second week of August).

When to look

PresentAll year
Peak weekSep 15-21mid September
Quietest weekAug 8-14the second week of August

Best: mid September. Here all year. Peak: on about 28% of Wyoming 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%10%20%30%Jan 1-7: 26% of 2543 checklistsJan 8-14: 26% of 2114 checklistsJan 15-21: 28% of 1984 checklistsJan 22-31: 26% of 2605 checklistsFeb 1-7: 28% of 1940 checklistsFeb 8-14: 26% of 1954 checklistsFeb 15-21: 27% of 2575 checklistsFeb 22-28: 27% of 1932 checklistsMar 1-7: 26% of 2486 checklistsMar 8-14: 25% of 2535 checklistsMar 15-21: 26% of 2726 checklistsMar 22-31: 26% of 4349 checklistsApr 1-7: 25% of 3300 checklistsApr 8-14: 23% of 3500 checklistsApr 15-21: 23% of 3701 checklistsApr 22-30: 23% of 5887 checklistsMay 1-7: 25% of 5341 checklistsMay 8-14: 25% of 6910 checklistsMay 15-21: 25% of 6884 checklistsMay 22-31: 27% of 10652 checklistsJun 1-7: 28% of 6807 checklistsJun 8-14: 28% of 6714 checklistsJun 15-21: 28% of 6708 checklistsJun 22-30: 27% of 8160 checklistsJul 1-7: 23% of 5755 checklistsJul 8-14: 23% of 5379 checklistsJul 15-21: 22% of 5299 checklistsJul 22-31: 23% of 6830 checklistsAug 1-7: 22% of 4581 checklistsAug 8-14: 21% of 4625 checklistsAug 15-21: 23% of 4466 checklistsAug 22-31: 25% of 6562 checklistsSep 1-7: 26% of 4543 checklistsSep 8-14: 28% of 4652 checklistsSep 15-21: 27% of 4186 checklistsSep 22-30: 30% of 5301 checklistsOct 1-7: 27% of 3248 checklistsOct 8-14: 24% of 3010 checklistsOct 15-21: 26% of 2624 checklistsOct 22-31: 24% of 3170 checklistsNov 1-7: 23% of 2110 checklistsNov 8-14: 24% of 2153 checklistsNov 15-21: 24% of 1971 checklistsNov 22-30: 23% of 2136 checklistsDec 1-7: 23% of 1646 checklistsDec 8-14: 26% of 1609 checklistsDec 15-21: 25% of 1954 checklistsDec 22-31: 27% 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. Sublette CountyBest early December · 58 checklists that week, 6,738 in all69%
  2. Teton CountyBest late April · 568 checklists that week, 34,686 in all56%
  3. Big Horn CountyBest the second week of November · 15 checklists that week, 2,023 in all53%
  4. Park CountyBest early January · 180 checklists that week, 27,277 in all43%
  5. Carbon CountyBest late October · 68 checklists that week, 6,429 in all42%
  6. Hot Springs CountyBest late October · 11 checklists that week, 1,345 in all41%

Best spots

Share of checklists at the peak
  1. Old Faithful GeyserTeton County, best late September · 51 checklists that week, 1,258 in all94%
  2. South Park Wildlife Habitat Management AreaTeton County, best the second week of May · 73 checklists that week, 756 in all89%
  3. Hutton Lake National Wildlife RefugeAlbany County, best late March · 21 checklists that week, 936 in all79%
  4. Medicine Bow National Forest (Turtle Rock)Albany County, best the second week of July · 21 checklists that week, 218 in all78%
  5. Hurricane VentPark County, best mid September · 22 checklists that week, 297 in all77%

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

Best time of day

In Wyoming, the Common Raven is most often listed on checklists started between 9 and 11 am (28% of those checklists).

0%10%20%30%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: 23% of 8808 checklists7 am: 24% of 18458 checklists8 am: 27% of 22143 checklists9 am: 28% of 21499 checklists10 am: 28% of 19425 checklists11 am: 27% of 16017 checklists12 pm: 26% of 13868 checklists1 pm: 26% of 12984 checklists2 pm: 26% of 12605 checklists3 pm: 24% of 11821 checklists4 pm: 23% of 10571 checklists5 pm: 22% of 8746 checklists6 pm: 20% of 6707 checklists7 pm: 17% 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
January26%26%28%26%
February28%26%27%27%
March26%25%26%26%
April25%23%23%23%
May25%25%25%27%
June28%28%28%27%
July23%23%22%23%
August22%21%23%25%
September26%28%27%30%
October27%24%26%24%
November23%24%24%23%
December23%26%25%27%

Neighboring states

  • Colorado: year-round, peaks early June
  • Utah: year-round, peaks mid October
  • Montana: year-round, peaks mid December
  • Idaho: year-round, peaks mid March

Common questions

When do Common Ravens arrive in Wyoming?
The Common Raven is in Wyoming all year. It turns up on about 28% of checklists at its peak (mid September) and on 22% in its quietest week (the second week of August).
When do Common Ravens leave Wyoming?
The Common Raven does not leave Wyoming: it is reported all year, from 22% of checklists in the second week of August to 28% in mid September.
When is the best time to see a Common Raven in Wyoming?
The Common Raven is reported most often in mid September, on about 28% of Wyoming checklists.
Where in Wyoming are Common Ravens seen most often?
By county, Sublette County, Teton County, and Big Horn County have the highest peak reporting rates for the Common Raven (counties with at least 200 checklists).