WhenToBird

2 bluebird species in Oregon

When Do Bluebirds Arrive in Oregon?

Adult male Western Bluebird
Photo: sprcrkwild, CC BY 4.0 via iNaturalist

Western Bluebirds and Mountain Bluebirds are the bluebirds you are most likely to see in Oregon. The Western Bluebird is in Oregon all year. It turns up on about 5.1% of checklists at its peak (the second week of March) and on 2.5% in its quietest week (early September).

When to look

PresentAll year
Peak weekMar 8-14the second week of March
Quietest weekSep 1-7early September

Best: the second week of March. Here all year. Peak: on about 5.1% of Oregon checklists.

  1. Janpeak season
  2. Febpeak season
  3. Marpeak season
  4. Aprpeak season
  5. Maypeak season
  6. Juncommon
  7. Julcommon
  8. Augcommon
  9. Sepcommon
  10. Octpeak season
  11. Novpeak season
  12. Decpeak season

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

Bluebirds in Oregon, species by species

SpeciesFirst arrivalsCommon byPeakMost gone byPeak %
Western Bluebirdall year–Mar 8-14–5.1%
Mountain BluebirdMar 1-7Mar 1-7Jun 8-14Oct 15-212.3%
0%2%4%6%Western BluebirdMountain BluebirdJanFebMarAprMayJunJulAugSepOctNovDec
  • Western Bluebird
  • Mountain 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 Oregon 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 Oregon

Best counties for Western Bluebird

Share of checklists at the peak
  1. Jackson CountyBest early November · 871 checklists that week, 60,428 in all22%
  2. Josephine CountyBest late July · 349 checklists that week, 20,837 in all20%
  3. Wasco CountyBest early October · 177 checklists that week, 13,127 in all16%
  4. Douglas CountyBest early March · 217 checklists that week, 17,976 in all13%
  5. Benton CountyBest late February · 3159 checklists that week, 144,626 in all12%
  6. Grant CountyBest the second week of March · 94 checklists that week, 6,818 in all12%

Common questions

When do bluebirds arrive in Oregon?
The Western Bluebird is in Oregon all year. It turns up on about 5.1% of checklists at its peak (the second week of March) and on 2.5% in its quietest week (early September).
When do bluebirds leave Oregon?
The Western Bluebird does not leave Oregon: it is reported all year, from 2.5% of checklists in early September to 5.1% in the second week of March.
When is the best time to see bluebirds in Oregon?
The Western Bluebird is reported most often in the second week of March, on about 5.1% of Oregon checklists.
Which bluebirds are in Oregon?
Western Bluebird and Mountain Bluebird are reported regularly; the Western Bluebird is the most common.