Seicercus castaniceps
Silhouette: Jiekun He · PhyloPic
In 3 days ~30% in a week ~50%
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 Langtang National Park on a given day, based on 35 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 107th most-seen of the 225 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.
February
In that month about 20% of wildlife watchers report a Chestnut-crowned Warbler in Langtang National Park on a given day, against under 5% in January and September, the lowest months. That is one of Langtang National Park's driest months, with about 45 mm of rain against 390 mm in July.
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.
4th of 7
Of the 7 parks where we can rate Chestnut-crowned Warbler sightings, Langtang National Park ranks 4th at about 10%. The best odds are in Namdapha National Park (India, about 20%), Doi Inthanon National Park (Thailand, about 20%) and Royal Manas National Park (Bhutan, about 10%).
Same genus: Seicercus
The closest relatives of the Chestnut-crowned Warbler that you can see in Langtang National Park (genus Seicercus) are Whistler's Warbler (about 20%) and Golden-spectacled 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 Langtang National Park (35 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.
