When do robins leave Wyoming?

American Robins never fully leave Wyoming: numbers fall back below half their usual rate by late September, but some are still reported in every week, about 9.0% of checklists at the low.

When is the best time to see robins in Wyoming?

The American Robin is reported most often in the second week of May, on about 57% of Wyoming checklists.

American Robin · Turdus migratorius

When Do Robins Arrive in Wyoming?

Photo: northerly, CC BY 4.0 via iNaturalist

American Robins are in Wyoming all year, but most are here in summer: numbers build from late March, peak in the second week of May (57% of checklists), and fall back by late September. In the quietest week (early February) they are still on about 9.0% of checklists.

When to look

Numbers buildMar 22-31late March

PeakMay 8-14the second week of May

Fall back bySep 22-30late September

FewestFeb 1-7early February

Best: the second week of May. Here all year; numbers build from late March and fall back by late September. Peak: on about 57% of Wyoming checklists.

Januncommon
Febuncommon
Marcommon
Aprpeak season
Maypeak season
Junpeak season
Julpeak season
Augcommon
Sepcommon
Octcommon
Novuncommon
Decuncommon

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

Robins in Wyoming, species by species

Species	First arrivals	Common by	Peak	Most gone by	Peak %
American Robin	Mar 22-31	Mar 22-31	May 8-14	Sep 22-30	57%

American Robin

Share of complete checklists reporting each species, by week (4 per month). Gaps: fewer than 10 checklists that week.

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.

Where in Wyoming

Best counties for American Robin

Share of checklists at the peak

Campbell CountyBest the second week of September · 69 checklists that week, 2,801 in all82%
Hot Springs CountyBest early June · 51 checklists that week, 1,345 in all77%
Crook CountyBest late June · 216 checklists that week, 3,915 in all72%
Sheridan CountyBest the second week of June · 191 checklists that week, 6,459 in all71%
Converse CountyBest early May · 108 checklists that week, 3,460 in all70%
Fremont CountyBest early June · 632 checklists that week, 27,707 in all70%

Common questions

When do robins arrive in Wyoming?: American Robins are in Wyoming all year, but most are here in summer: numbers build from late March, peak in the second week of May (57% of checklists), and fall back by late September. In the quietest week (early February) they are still on about 9.0% of checklists.
When do robins leave Wyoming?: American Robins never fully leave Wyoming: numbers fall back below half their usual rate by late September, but some are still reported in every week, about 9.0% of checklists at the low.
When is the best time to see robins in Wyoming?: The American Robin is reported most often in the second week of May, on about 57% of Wyoming checklists.