When do bluebirds leave Massachusetts?

The Eastern Bluebird does not leave Massachusetts: it is reported all year, from 7.4% of checklists in mid August to 14% in mid March.

When is the best time to see bluebirds in Massachusetts?

The Eastern Bluebird is reported most often in mid March, on about 14% of Massachusetts checklists.

Eastern Bluebird · Sialia sialis

When Do Bluebirds Arrive in Massachusetts?

Photo: Dan Vickers, CC BY 4.0 via iNaturalist

The Eastern Bluebird is in Massachusetts all year. It turns up on about 14% of checklists at its peak (mid March) and on 7.4% in its quietest week (mid August). They are the only regular bluebirds in Massachusetts.

When to look

PresentAll year

Peak weekMar 15-21mid March

Quietest weekAug 15-21mid August

Best: mid March. Here all year. Peak: on about 14% of Massachusetts checklists.

Jancommon
Febpeak season
Marpeak season
Aprpeak season
Maypeak season
Junpeak season
Julcommon
Augcommon
Sepcommon
Octpeak season
Novpeak season
Deccommon

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

Bluebirds in Massachusetts, species by species

Species	First arrivals	Common by	Peak	Most gone by	Peak %
Eastern Bluebird	all year	–	Mar 15-21	–	14%

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 Massachusetts 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 Massachusetts

Best counties for Eastern Bluebird

Share of checklists at the peak

Worcester CountyBest mid March · 3073 checklists that week, 128,594 in all26%
Franklin CountyBest late October · 977 checklists that week, 41,382 in all25%
Hampshire CountyBest late October · 4201 checklists that week, 162,423 in all20%
Berkshire CountyBest early March · 1541 checklists that week, 92,890 in all20%
Hampden CountyBest mid April · 1026 checklists that week, 35,410 in all18%
Middlesex CountyBest late October · 7374 checklists that week, 307,511 in all15%

Common questions

When do bluebirds arrive in Massachusetts?: The Eastern Bluebird is in Massachusetts all year. It turns up on about 14% of checklists at its peak (mid March) and on 7.4% in its quietest week (mid August). They are the only regular bluebirds in Massachusetts.
When do bluebirds leave Massachusetts?: The Eastern Bluebird does not leave Massachusetts: it is reported all year, from 7.4% of checklists in mid August to 14% in mid March.
When is the best time to see bluebirds in Massachusetts?: The Eastern Bluebird is reported most often in mid March, on about 14% of Massachusetts checklists.