Zosterops erythropleurus
Silhouette: Ferran Sayol · PhyloPic
In 3 days ~10%
The chestnut-flanked white-eye (Zosterops erythropleurus) is a bird in the family Zosteropidae. The species was first described by Robert Swinhoe in 1863. It is found in forests, and prefers rather deep mixed and coniferous forests.
It is 10.5 cm in length and has a distinct chestnut patch on its flanks. The bill base and lower mandible may be pinkish. Its underparts are whiter. The similar Japanese white-eye is pale brown on its flanks. It is migratory, breeding in Manchuria and migrating to central China, the province of Yunnan and northern Southeast Asia in the winter. It is the most migratory species of white-eye. It breeds in poplar, alder and willow forests, thickets and groves, and winters in deciduous and evergreen forests, usually above 1000 m. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Doi Inthanon National Park | 🇹🇭 Thailand | |
| 2 | Khao Yai National Park | 🇹🇭 Thailand | |
| 3 | Jiuzhaigou National Park | 🇨🇳 China | |
| 4 | Kaeng Krachan National Park | 🇹🇭 Thailand |
| # | Zoo / Centre | Country | |
|---|---|---|---|
| 1 | Schönbrunn Zoo | 🇦🇹 Austria |
Rare
Under 5% of wildlife watchers report a Chestnut-flanked White-eye sighting in Kaeng Krachan National Park on a given day, based on 64 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 253rd most-seen of the 360 birds we can rate there. Over three days the chance rises to about 10%, if each day is a fresh chance.
November
In that month about 10% of wildlife watchers report a Chestnut-flanked White-eye in Kaeng Krachan National Park on a given day, against under 5% in December to October, the lowest months.
Between 2 and 5 am
Across all the parks we cover, that three-hour window holds the most Chestnut-flanked White-eye 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.
4th of 4
Of the 4 parks where we can rate Chestnut-flanked White-eye sightings, Kaeng Krachan National Park ranks 4th at under 5%. The best odds are in Doi Inthanon National Park (Thailand, about 20%), Khao Yai National Park (Thailand, about 20%) and Jiuzhaigou National Park (China, about 10%).
GBIF citizen-science records
It is estimated from how often the Chestnut-flanked White-eye is recorded against all the birds logged in Kaeng Krachan National Park (64 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.
