Phylloscopus borealoides
Silhouette: Jiekun He · PhyloPic
In 3 days <5%
The Sakhalin leaf warbler (Phylloscopus borealoides) is a species of Old World warbler in the family Phylloscopidae. It is found in Sakhalin, the Kuril Islands and Japan; it winters to the Amami and Okinawa islands and Indochina.
Its natural habitat is temperate forests. It has a long white supercilium and broad, dark brown eye-stripes. Its crown, upper parts, and bill are also dark brown. It has greenish-brown cheeks and its ear-coverts are mottled. Its bill has a pink base that extends to the lower mandible. Its legs are pale pinkish-brown.
It is easily confused with the pale-legged leaf warbler. One possible distinguishing feature is that its upperparts are slightly more greenish. It is more easily distinguished by its lower-pitched vocalizations, but some overlap does exist in the species' pitch ranges.
It nests in shrubs. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Nikko National Park | 🇯🇵 Japan | |
| 2 | Khao Luang National Park | 🇹🇭 Thailand | |
| 3 | Khao Sok National Park | 🇹🇭 Thailand | |
| 4 | Kaeng Krachan National Park | 🇹🇭 Thailand | |
| 5 | Doi Inthanon National Park | 🇹🇭 Thailand | |
| 6 | Khao Yai National Park | 🇹🇭 Thailand |
Rare
Under 5% of wildlife watchers report a Sakhalin Leaf-Warbler sighting in Khao Yai National Park on a given day, based on 6 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 272nd most-seen of the 278 birds we can rate there. Over three days the chance rises to under 5%, if each day is a fresh chance.
Any time of year
In every month with enough records, under 5% of wildlife watchers report a Sakhalin Leaf-Warbler in Khao Yai National Park on a given day, so our monthly data shows no clear season.
6th of 6
Of the 6 parks where we can rate Sakhalin Leaf-Warbler sightings, Khao Yai National Park ranks 6th at under 5%. The best odds are in Nikko National Park (Japan, about 10%), Khao Luang National Park (Thailand, about 10%) and Khao Sok National Park (Thailand, under 5%).
Same genus: Phylloscopus
The closest relatives of the Sakhalin Leaf-Warbler that you can see in Khao Yai National Park (genus Phylloscopus, Leaf Warblers) are Yellow-browed Warbler (about 50%), Two-barred Warbler (about 20%) and Claudia's Leaf-Warbler (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Sakhalin Leaf-Warbler is recorded against all the birds logged in Khao Yai National Park (6 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.
