Phylloscopus schwarzi
Silhouette: Jiekun He · PhyloPic
In 3 days ~30% in a week ~50%
Radde's warbler (Phylloscopus schwarzi) is a leaf warbler which breeds in Siberia. This warbler is strongly migratory and winters in Southeast Asia. The genus name Phylloscopus is from Ancient Greek phullon, "leaf", and skopos, "seeker" (from skopeo, "to watch"). The specific schwarzi commemorates German astronomer Ludwig Schwarz (1822–1894).
This is a warbler similar in size to a willow warbler. The adult has an unstreaked brown back and buff underparts. There is a very long prominent whitish supercilium, and the pointed bill is thicker than that of the similar dusky warbler. The legs are paler than those of the dusky warbler, and the feet look large, reflecting the more terrestrial lifestyle of this warbler. The sexes are identical, as with most warblers, but young birds are yellower below. The call is a soft chick.
Radde's warbler breeds in southern parts of Central and Eastern Siberia as far east as Korea and Manchuria. It is a migratory species and spends the winter in Bangladesh, Cambodia, Laos, Myanmar and Thailand. In its breeding range, Radde's warbler is found in open deciduous woodlands with some undergrowth and bushy woodland... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Khao Yai National Park | 🇹🇭 Thailand | |
| 2 | Kaeng Krachan National Park | 🇹🇭 Thailand | |
| 3 | Doi Inthanon National Park | 🇹🇭 Thailand | |
| 4 | Cat Tien National Park | 🇻🇳 Vietnam |
With luck
About 10% of wildlife watchers report a Radde's Warbler sighting in Kaeng Krachan National Park on a given day, based on 354 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 141st most-seen of the 360 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 and March
In those months about 20% of wildlife watchers report a Radde's Warbler in Kaeng Krachan National Park on a given day, against under 5% in May to November, the lowest months. Those are among Kaeng Krachan National Park's driest months, with about 55 mm of rain a month against 260 mm in September.
Between 2 and 5 am
Across all the parks we cover, that three-hour window holds the most Radde's 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.
2nd of 4
Of the 4 parks where we can rate Radde's Warbler sightings, Kaeng Krachan National Park ranks 2nd at about 10%. The best odds are in Khao Yai National Park (Thailand, about 20%).
Same genus: Phylloscopus
The closest relatives of the Radde's Warbler that you can see in Kaeng Krachan National Park (genus Phylloscopus, Leaf Warblers) are Yellow-browed Warbler (about 30%), Two-barred Warbler (about 20%) and Sulphur-breasted Warbler (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Radde's Warbler is recorded against all the birds logged in Kaeng Krachan National Park (354 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.
