Pycnonotus taivanus
Silhouette: Andy Wilson · PhyloPic
In 3 days ~60% in a week ~90%
Styan's bulbul (Pycnonotus taivanus) is a species of bulbul that is endemic to eastern and southern Taiwan. Though locally common in some areas, it has been listed as a species vulnerable to extinction. Its decline has been caused by habitat destruction and hybridisation with the closely related Chinese or light-vented bulbul. The two species' ranges overlap in several areas, partly because birds of the latter species have been released for Buddhist ceremonies. The species has already become extinct in Yilan County (Taiwan).
Alternate names for Styan's bulbul include the Formosan black-headed bulbul and Taiwan black-headed bulbul. The latter name is also used to refer to a subspecies of the light-vented bulbul. Styan's bulbul has a very similar appearance to the light-vented bulbul, but they differ in the patterns on the head. Styan's bulbul has a completely black crown with white feathers around its eye, except for a black moustachial stripe below the beak. Hybrids are intermediate between the two species, with the moustachial stripe and white feathers around the eye, but the white feathers extend behind the crown. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Taroko National Park | 🇹🇼 Taiwan |
More parks will be added in future updates.
Possible
About 30% of wildlife watchers report a Styan's Bulbul sighting in Taroko National Park on a given day, based on 891 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 31st most-seen of the 147 birds we can rate there. Over three days the chance rises to about 60%, and over a week to about 90%, if each day is a fresh chance.
January and November
In those months about 50% of wildlife watchers report a Styan's Bulbul in Taroko National Park on a given day, against about 10% in May to August, the lowest months.
Between 11 pm and 2 am
Across all the parks we cover, that three-hour window holds the most Styan's 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.
Only Taroko National Park, in our data
Taroko National Park is the only park on Wallace's Line with enough records to rate Styan's Bulbul sightings: about 30% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Styan's Bulbul is recorded against all the birds logged in Taroko National Park (891 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.
