WhenToBird

Bullock's Oriole · Icterus bullockii

When Do Orioles Arrive in Oregon?

Adult male Bullock's Oriole
Photo: sprcrkwild, CC BY 4.0 via iNaturalist

Bullock's Orioles reach Oregon in mid April, are common by early May, peak in late May (12% of checklists), and most are gone by the second week of July. They are the only regular orioles in Oregon.

Orioles here are the birds (Baltimore, Orchard, Bullock's and relatives), not the baseball team.

When to look

First arrivalsApr 15-21mid April
Common byMay 1-7early May
PeakMay 22-31late May
Most gone byJul 8-14the second week of July

Best: late May. First arrivals mid April; most are gone by the second week of July. Peak: on about 12% of Oregon checklists.

  1. Jannot usually seen
  2. Febnot usually seen
  3. Marnot usually seen
  4. Apruncommon
  5. Maypeak season
  6. Junpeak season
  7. Julcommon
  8. Auguncommon
  9. Sepnot usually seen
  10. Octnot usually seen
  11. Novnot usually seen
  12. Decnot usually seen

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

Orioles in Oregon, species by species

SpeciesFirst arrivalsCommon byPeakMost gone byPeak %
Bullock's OrioleApr 15-21May 1-7May 22-31Jul 8-1412%
0%5%10%15%Bullock's OrioleJanFebMarAprMayJunJulAugSepOctNovDec
  • Bullock's Oriole
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 Bullock's Oriole

Share of checklists at the peak
  1. Sherman CountyBest mid May · 100 checklists that week, 4,629 in all47%
  2. Gilliam CountyBest early July · 55 checklists that week, 2,323 in all38%
  3. Harney CountyBest late May · 6713 checklists that week, 40,943 in all35%
  4. Malheur CountyBest mid June · 242 checklists that week, 4,699 in all32%
  5. Umatilla CountyBest mid May · 434 checklists that week, 17,651 in all29%
  6. Morrow CountyBest late June · 106 checklists that week, 3,484 in all27%

Common questions

When do orioles arrive in Oregon?
Bullock's Orioles reach Oregon in mid April, are common by early May, peak in late May (12% of checklists), and most are gone by the second week of July. They are the only regular orioles in Oregon.
When do orioles leave Oregon?
Most Bullock's Orioles have left Oregon by the second week of July, when reports fall below half their usual rate. Stragglers are still reported until the second week of August.
When is the best time to see orioles in Oregon?
The Bullock's Oriole is reported most often in late May, on about 12% of Oregon checklists.