Hemixos castanonotus
Silhouette: PhyloPic
In 3 days ~40% in a week ~60%
The chestnut bulbul or chestnut-backed bulbul (Hemixos castanonotus) is a songbird in the bulbul family, Pycnonotidae. The species was first described by Robert Swinhoe in 1870. It is found in southern China and northern Vietnam. Its natural habitat is subtropical or tropical moist lowland forests; it primarily resides in the canopy.
It is an omnivore. Formerly, some authorities classified the chestnut bulbul in the genus Hypsipetes and also as a subspecies of the ashy bulbul. Wikipedia →
| # | Park | Country | Daily sighting probability |
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More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Chestnut Bulbul sighting in Hong Kong on a given day, based on 339 verified sightings from GBIF citizen-science data. It is the 31st most-seen of the 204 birds we can rate there. Over three days the chance rises to about 40%, and over a week to about 60%, if each day is a fresh chance.
November and December
In those months about 30% of wildlife watchers report a Chestnut Bulbul in Hong Kong on a given day, against under 5% in April–July and September–October, the lowest months. Those are among Hong Kong's driest months, with about 30 mm of rain a month against 280 mm in June.
7th of 14
Of the 14 cities where we can rate Chestnut Bulbul sightings, Hong Kong ranks 7th at about 10%. The best odds are in Fuzhou (China, about 40%), Changsha (China, about 30%) and Hangzhou (China, about 30%).
Same family: Pycnonotidae
The closest relatives of the Chestnut Bulbul that you can see in Hong Kong (family Pycnonotidae, Bulbuls) are Red-whiskered Bulbul (about 90%) and Light-vented Bulbul (about 80%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Chestnut Bulbul is recorded against all the birds logged in Hong Kong (339 verified sightings), 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.
