Rubigula cyaniventris
Silhouette: PhyloPic
In 3 days ~30% in a week ~50%
The grey-bellied bulbul (Ixodia cyaniventris) is a species of songbird in the bulbul family. It is found on the Malay Peninsula, Sumatra and Borneo. Its natural habitat is subtropical or tropical moist lowland forests. It is threatened by habitat loss.
This species was previously placed in the large bulbul genus Pycnonotus, which was found to be polyphyletic in molecular phylogenetic studies, resulting in three species, including the grey-bellied bulbul, being moved to Ixodia. Some authorities use Ixidia for the genus name because Ixodia was thought to be preoccupied.
Found on Borneo Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Khao Sok National Park | 🇹🇭 Thailand | |
| 2 | Taman Negara National Park | 🇲🇾 Malaysia | |
| 3 | Danum Valley Conservation Area | 🇲🇾 Malaysia | |
| 4 | Kerinci Seblat National Park | 🇮🇩 Indonesia | |
| 5 | Sepilok | 🇲🇾 Malaysia | |
| 6 | Gunung Leuser National Park | 🇮🇩 Indonesia |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Kuala Lumpur | 🇲🇾 Malaysia |
With luck
About 10% of wildlife watchers report a Gray-bellied Bulbul sighting in Danum Valley Conservation Area on a given day, based on 157 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 131st most-seen of the 258 birds we can rate there. Over three days the chance rises to about 30%, and over a week to about 50%, if each day is a fresh chance.
September
In that month about 20% of wildlife watchers report a Gray-bellied Bulbul in Danum Valley Conservation Area on a given day, against under 5% in February, August and October–November, the lowest months.
Between 3 and 6 am
Across all the parks we cover, that three-hour window holds the most Gray-bellied Bulbul sightings with a recorded time, and about 6 in 10 of them come between 6 pm and 6 am: it is most active around dawn and dusk.
Among the best
Of the 6 parks where we can rate Gray-bellied Bulbul sightings, Danum Valley Conservation Area ranks 3rd at about 10%, level with the leaders once rounded. The best odds are in Khao Sok National Park (Thailand, about 10%) and Taman Negara National Park (Malaysia, about 10%).
Same genus: Rubigula
The closest relatives of the Gray-bellied Bulbul that you can see in Danum Valley Conservation Area (genus Rubigula, Rubigula Bulbuls) are Spectacled Bulbul (about 50%) and Scaly-breasted Bulbul (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Gray-bellied Bulbul is recorded against all the birds logged in Danum Valley Conservation Area (157 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.
