Seicercus castaniceps
Silhouette: Jiekun He · PhyloPic
In 3 days ~30% in a week ~60%
The chestnut-crowned warbler (Phylloscopus castaniceps) is a species of leaf warbler (family Phylloscopidae). It was formerly included in the "Old World warbler" assemblage. It is found in Bangladesh, Bhutan, Cambodia, China, India, Indonesia, Laos, Malaysia, Myanmar, Nepal, Thailand, and Vietnam. Its natural habitats are subtropical or tropical moist lowland forest and subtropical or tropical moist montane forest. Nine subspecies are recognised across its range, and it forms a superspecies with the Sunda warbler and the yellow-breasted warbler.
It is arboreal and primarily insectivorous. Though not considered migratory, it may make small seasonal movements to higher or lower elevations. The chestnut-crowned warbler was previously placed in the genus Seicercus. A molecular phylogenetic study published in 2018 found that neither Phylloscopus nor Seicercus were monophyletic. In the subsequent reorganization the two genera were merged into Phylloscopus which has priority under the rules of the International Commission on Zoological Nomenclature. Wikipedia →
Recording0:32
China · 2020
© Yuxuan Liu · iNaturalist · CC BY-NC 4.0
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Namdapha National Park | 🇮🇳 India | |
| 2 | Doi Inthanon National Park | 🇹🇭 Thailand | |
| 3 | Royal Manas National Park | 🇧🇹 Bhutan | |
| 4 | Langtang National Park | 🇳🇵 Nepal | |
| 5 | Kerinci Seblat National Park | 🇮🇩 Indonesia | |
| 6 | Manas National Park | 🇮🇳 India | |
| 7 | Jim Corbett National Park | 🇮🇳 India |
With luck
About 10% of wildlife watchers report a Chestnut-crowned Warbler sighting in Royal Manas National Park on a given day, based on 137 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 118th most-seen of the 388 birds we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
March and October
In those months about 20% of wildlife watchers report a Chestnut-crowned Warbler in Royal Manas National Park on a given day, against under 5% in June, the lowest month. Those are among Royal Manas National Park's driest months, with about 120 mm of rain a month against 930 mm in July. August and September have too few records to rate.
Between 3 and 6 am
Across all the parks we cover, that three-hour window holds the most Chestnut-crowned Warbler 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.
3rd of 7
Of the 7 parks where we can rate Chestnut-crowned Warbler sightings, Royal Manas National Park ranks 3rd at about 10%. The best odds are in Namdapha National Park (India, about 20%) and Doi Inthanon National Park (Thailand, about 20%).
Same genus: Seicercus
The closest relatives of the Chestnut-crowned Warbler that you can see in Royal Manas National Park (genus Seicercus) are Gray-cheeked Warbler (about 10%) and Whistler's Warbler (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Chestnut-crowned Warbler is recorded against all the birds logged in Royal Manas National Park (137 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.
