When do juncos leave Wyoming?

Dark-eyed Juncos never fully leave Wyoming: numbers fall back below half their usual rate by mid April, but some are still reported in every week, about 9.2% of checklists at the low.

When is the best time to see juncos in Wyoming?

The Dark-eyed Junco is reported most often in the second week of April, on about 26% of Wyoming checklists.

Dark-eyed Junco · Junco hyemalis

When Do Juncos Arrive in Wyoming?

Photo: Jimmy Dee, CC BY-SA 4.0 via iNaturalist

Dark-eyed Juncos are in Wyoming all year, but most are here in spring: numbers build from the second week of February, peak in the second week of April (26% of checklists), and fall back by mid April. In the quietest week (late May) they are still on about 9.2% of checklists.

When to look

Numbers buildFeb 8-14the second week of February

PeakApr 8-14the second week of April

Fall back byApr 15-21mid April

FewestMay 22-31late May

Best: the second week of April. Here all year; numbers build from the second week of February and fall back by mid April. Peak: on about 26% of Wyoming checklists.

Jancommon
Febpeak season
Marpeak season
Aprpeak season
Maycommon
Juncommon
Julcommon
Augcommon
Sepcommon
Octcommon
Novcommon
Deccommon

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

Juncos in Wyoming, species by species

Species	First arrivals	Common by	Peak	Most gone by	Peak %
Dark-eyed Junco	Feb 8-14	Feb 8-14	Apr 8-14	Apr 15-21	26%

Dark-eyed Junco

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 Dark-eyed Junco

Share of checklists at the peak

Crook CountyBest mid February · 43 checklists that week, 3,915 in all67%
Weston CountyBest early February · 24 checklists that week, 2,297 in all61%
Sublette CountyBest the second week of April · 157 checklists that week, 6,738 in all53%
Teton CountyBest the second week of April · 298 checklists that week, 34,686 in all42%
Campbell CountyBest the second week of October · 60 checklists that week, 2,801 in all40%
Laramie CountyBest late October · 308 checklists that week, 15,593 in all40%

Common questions

When do juncos arrive in Wyoming?: Dark-eyed Juncos are in Wyoming all year, but most are here in spring: numbers build from the second week of February, peak in the second week of April (26% of checklists), and fall back by mid April. In the quietest week (late May) they are still on about 9.2% of checklists.
When do juncos leave Wyoming?: Dark-eyed Juncos never fully leave Wyoming: numbers fall back below half their usual rate by mid April, but some are still reported in every week, about 9.2% of checklists at the low.
When is the best time to see juncos in Wyoming?: The Dark-eyed Junco is reported most often in the second week of April, on about 26% of Wyoming checklists.