When do bluebirds leave Wisconsin?

Most Eastern Bluebirds have left Wisconsin by early November, when reports fall below half their usual rate. Stragglers are still reported until mid November.

When is the best time to see bluebirds in Wisconsin?

The Eastern Bluebird is reported most often in the second week of July, on about 12% of Wisconsin checklists.

Eastern Bluebird · Sialia sialis

When Do Bluebirds Arrive in Wisconsin?

Photo: Dan Vickers, CC BY 4.0 via iNaturalist

Eastern Bluebirds reach Wisconsin in late February, are common by mid March, peak in the second week of July (12% of checklists), and most are gone by early November. They are the only regular bluebirds in Wisconsin.

When to look

First arrivalsFeb 22-28late February

Common byMar 15-21mid March

PeakJul 8-14the second week of July

Most gone byNov 1-7early November

Best: the second week of July. First arrivals late February; most are gone by early November. Peak: on about 12% of Wisconsin checklists.

Janrare
Febuncommon
Marcommon
Aprpeak season
Maypeak season
Junpeak season
Julpeak season
Augpeak season
Seppeak season
Octpeak season
Novcommon
Decrare

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

Bluebirds in Wisconsin, species by species

Species	First arrivals	Common by	Peak	Most gone by	Peak %
Eastern Bluebird	Feb 22-28	Mar 15-21	Jul 8-14	Nov 1-7	12%

Eastern Bluebird

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 Wisconsin 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 Wisconsin

Best counties for Eastern Bluebird

Share of checklists at the peak

Dunn CountyBest early October · 112 checklists that week, 8,247 in all37%
Taylor CountyBest the second week of May · 104 checklists that week, 4,326 in all36%
Crawford CountyBest the second week of July · 67 checklists that week, 4,271 in all33%
Green CountyBest the second week of October · 57 checklists that week, 4,387 in all30%
Green Lake CountyBest late July · 236 checklists that week, 15,345 in all29%
Marquette CountyBest the second week of July · 56 checklists that week, 3,706 in all29%

Common questions

When do bluebirds arrive in Wisconsin?: Eastern Bluebirds reach Wisconsin in late February, are common by mid March, peak in the second week of July (12% of checklists), and most are gone by early November. They are the only regular bluebirds in Wisconsin.
When do bluebirds leave Wisconsin?: Most Eastern Bluebirds have left Wisconsin by early November, when reports fall below half their usual rate. Stragglers are still reported until mid November.
When is the best time to see bluebirds in Wisconsin?: The Eastern Bluebird is reported most often in the second week of July, on about 12% of Wisconsin checklists.