Phylloscopus borealoides
Silhouette: Jiekun He · PhyloPic
In 3 days <5% in a week ~10%
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 Nagoya on a given day, based on 42 verified sightings from GBIF citizen-science data. It is the 97th most-seen of the 165 birds we can rate there. Over three days the chance rises to under 5%, and over a week to about 10%, if each day is a fresh chance.
April
In that month about 10% of wildlife watchers report a Sakhalin Leaf-Warbler in Nagoya on a given day, against under 5% in May to March, the lowest months.
Among the best
Of the 9 cities where we can rate Sakhalin Leaf-Warbler sightings, Nagoya ranks 3rd at under 5%, level with the leaders once rounded. The best odds are in Sendai (Japan, under 5%) and Bangkok (Thailand, under 5%).
GBIF citizen-science records
It is estimated from how often the Sakhalin Leaf-Warbler is recorded against all the birds logged in Nagoya (42 verified sightings), 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.
