Oriolus percivali
Silhouette: L. Shyamal · PhyloPic
In 3 days ~80% in a week >90%
The mountain oriole (Oriolus percivali) is a bird species in the family Oriolidae. It is native to the Albertine Rift montane forests, Uganda and Kenya. Its natural habitats are subtropical or tropical moist montane forests.
The mountain oriole has been considered by some authorities to be a subspecies of the black-headed oriole or the black-winged oriole. Alternate names for the mountain oriole include the black-tailed oriole, montane oriole and Percival's oriole, the last name after Arthur Blayney Percival. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Bwindi Impenetrable National Park | 🇺🇬 Uganda | |
| 2 | Nyungwe National Park | 🇷🇼 Rwanda | |
| 3 | Aberdare National Park | 🇰🇪 Kenya | |
| 4 | Kibale National Park | 🇺🇬 Uganda |
Likely
About 40% of wildlife watchers report a Black-tailed Oriole sighting in Nyungwe National Park on a given day, based on 603 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 17th most-seen of the 252 birds we can rate there. Over three days the chance rises to about 80%, and over a week to over 90%, if each day is a fresh chance.
December and January
In those months about 60% of wildlife watchers report a Black-tailed Oriole in Nyungwe National Park on a given day, against about 20% in August, the lowest month. Those are among Nyungwe National Park's wettest months, with about 470 mm of rain a month against 30 mm in July.
Between 7 and 10 am
Across all the parks we cover, that three-hour window holds the most Black-tailed Oriole sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Among the best
Of the 4 parks where we can rate Black-tailed Oriole sightings, Nyungwe National Park ranks 2nd at about 40%, level with the leaders once rounded. The best odds are in Bwindi Impenetrable National Park (Uganda, about 40%).
GBIF citizen-science records
It is estimated from how often the Black-tailed Oriole is recorded against all the birds logged in Nyungwe National Park (603 verified sightings from 2019 to 2026), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
