WhenToBird

Bullock's Oriole · Icterus bullockii

When Do Orioles Arrive in Idaho?

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

Bullock's Orioles reach Idaho in late April, are common by early May, peak in late May (24% of checklists), and most are gone by late July. They are the only regular orioles in Idaho.

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

When to look

First arrivalsApr 22-30late April
Common byMay 1-7early May
PeakMay 22-31late May
Most gone byJul 22-31late July

Best: late May. First arrivals late April; most are gone by late July. Peak: on about 24% of Idaho checklists.

  1. Jannot usually seen
  2. Febnot usually seen
  3. Marnot usually seen
  4. Aprrare
  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 Idaho, species by species

SpeciesFirst arrivalsCommon byPeakMost gone byPeak %
Bullock's OrioleApr 22-30May 1-7May 22-31Jul 22-3124%
0%10%20%30%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 Idaho 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 Idaho

Best counties for Bullock's Oriole

Share of checklists at the peak
  1. Power CountyBest mid June · 46 checklists that week, 2,278 in all56%
  2. Minidoka CountyBest mid May · 27 checklists that week, 1,365 in all52%
  3. Gooding CountyBest late May · 77 checklists that week, 3,207 in all47%
  4. Lincoln CountyBest mid May · 11 checklists that week, 218 in all47%
  5. Oneida CountyBest late May · 97 checklists that week, 1,750 in all45%
  6. Jerome CountyBest mid May · 20 checklists that week, 804 in all44%

Common questions

When do orioles arrive in Idaho?
Bullock's Orioles reach Idaho in late April, are common by early May, peak in late May (24% of checklists), and most are gone by late July. They are the only regular orioles in Idaho.
When do orioles leave Idaho?
Most Bullock's Orioles have left Idaho by late July, when reports fall below half their usual rate. Stragglers are still reported until mid August.
When is the best time to see orioles in Idaho?
The Bullock's Oriole is reported most often in late May, on about 24% of Idaho checklists.