Onychognathus walleri
Silhouette: Rafael Maia · PhyloPic
In 3 days ~40% in a week ~80%
Waller's starling (Onychognathus walleri) is a species of starling in the family Sturnidae. It is native to the Western High Plateau and Bioko, the Albertine Rift montane forests, the East African montane forests and the Eastern Arc forests.
The common name and scientific name commemorates the English naturalist Gerald Waller. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Nyungwe National Park | 🇷🇼 Rwanda | |
| 2 | Bwindi Impenetrable National Park | 🇺🇬 Uganda | |
| 3 | Arusha National Park | 🇹🇿 Tanzania | |
| 4 | Mkomazi National Park | 🇹🇿 Tanzania | |
| 5 | Aberdare National Park | 🇰🇪 Kenya | |
| 6 | Ngorongoro Conservation Area | 🇹🇿 Tanzania | |
| 7 | Kibale National Park | 🇺🇬 Uganda | |
| 8 | Queen Elizabeth National Park | 🇺🇬 Uganda |
Possible
About 20% of wildlife watchers report a Waller's Starling sighting in Arusha National Park on a given day, based on 110 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 100th most-seen of the 373 birds we can rate there. Over three days the chance rises to about 40%, and over a week to about 80%, if each day is a fresh chance.
September
In that month about 40% of wildlife watchers report a Waller's Starling in Arusha National Park on a given day, against about 10% in April–June and November–February, the lowest months. That is one of Arusha National Park's driest months, with about 65 mm of rain against 440 mm in April.
Between 7 and 10 am
Across all the parks we cover, that three-hour window holds the most Waller's Starling sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
3rd of 8
Of the 8 parks where we can rate Waller's Starling sightings, Arusha National Park ranks 3rd at about 20%. The best odds are in Nyungwe National Park (Rwanda, about 30%) and Bwindi Impenetrable National Park (Uganda, about 20%).
GBIF citizen-science records
It is estimated from how often the Waller's Starling is recorded against all the birds logged in Arusha National Park (110 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.
