WhenToBird

2 oriole species in Wyoming

When Do Orioles Arrive in Wyoming?

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

Bullock's Orioles and Orchard Orioles are the orioles you are most likely to see in Wyoming. Bullock's Orioles reach Wyoming in late April, are common by early May, peak in late May (15% of checklists), and most are gone by early August.

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 byAug 1-7early August

Best: late May. First arrivals late April; most are gone by early August. Peak: on about 15% of Wyoming 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. Seprare
  10. Octnot usually seen
  11. Novnot usually seen
  12. Decnot usually seen

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

Orioles in Wyoming, species by species

SpeciesFirst arrivalsCommon byPeakMost gone byPeak %
Bullock's OrioleApr 22-30May 1-7May 22-31Aug 1-715%
Orchard OrioleMay 8-14May 8-14May 22-31Jul 15-212.0%
0%5%10%15%20%Bullock's OrioleOrchard OrioleJanFebMarAprMayJunJulAugSepOctNovDec
  • Bullock's Oriole
  • Orchard 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 Wyoming 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 Wyoming

Best counties for Bullock's Oriole

Share of checklists at the peak
  1. Platte CountyBest late May · 92 checklists that week, 1,645 in all44%
  2. Hot Springs CountyBest late May · 43 checklists that week, 1,345 in all37%
  3. Converse CountyBest late May · 213 checklists that week, 3,460 in all36%
  4. Campbell CountyBest mid May · 123 checklists that week, 2,801 in all32%
  5. Goshen CountyBest mid May · 156 checklists that week, 1,920 in all31%
  6. Natrona CountyBest late May · 347 checklists that week, 5,810 in all30%

Common questions

When do orioles arrive in Wyoming?
Bullock's Orioles reach Wyoming in late April, are common by early May, peak in late May (15% of checklists), and most are gone by early August.
When do orioles leave Wyoming?
Most Bullock's Orioles have left Wyoming by early August, when reports fall below half their usual rate. Stragglers are still reported until early September.
When is the best time to see orioles in Wyoming?
The Bullock's Oriole is reported most often in late May, on about 15% of Wyoming checklists.
Which orioles are in Wyoming?
Bullock's Oriole and Orchard Oriole are reported regularly; the Bullock's Oriole is the most common.