Seicercus soror
Silhouette: Jiekun He · PhyloPic
In 3 days ~20% in a week ~30%
Alström's warbler (Phylloscopus soror), or the plain-tailed warbler, is a species of Old World warbler in the family Phylloscopidae. It was first described in 1999. It breeds only in China and winters as far as Thailand, Laos, Cambodia and Vietnam. Its natural habitat is temperate forests.
Alström's warbler often forages in a low, dense growth of forests. This bird is known to eat insects and catch prey during short flights. The bird is not currently globally threatened. This bird has a very large range and does not approach the potential of being a vulnerable species. The warbler typically breeds in warmer, temperate areas. These areas are found within evergreen broadleaf forest zones and lush undergrowth in mature forests. It has a scattered breeding range across central and eastern China. The warbler tends to breed in bushes and small trees of low to moderate height, in recently cleared areas. This bird is a migratory species. It migrates during the winter to southern Myanmar, Thailand, Cambodia, southern Vietnam, and southern China.
Alström's warbler was previously placed in the genus Seicercus. A molecular phylogenetic study published in... Wikipedia →
Recording0:12
China · 2026
© 管牧山 · iNaturalist · CC BY-NC 4.0
Recording0:48
China · 2024
© Jiao Sun (孙娇) · iNaturalist · CC BY 4.0
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Khao Yai National Park | 🇹🇭 Thailand | |
| 2 | Kaeng Krachan National Park | 🇹🇭 Thailand | |
| 3 | Doi Inthanon National Park | 🇹🇭 Thailand |
With luck
About 10% of wildlife watchers report an Alström's Warbler sighting in Kaeng Krachan National Park on a given day, based on 243 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 181st most-seen of the 360 birds we can rate there. Over three days the chance rises to about 20%, and over a week to about 30%, if each day is a fresh chance.
November to March
In those months about 10% of wildlife watchers report an Alström's Warbler in Kaeng Krachan National Park on a given day, against under 5% in April to October, 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.
Among the best
Of the 3 parks where we can rate Alström's Warbler sightings, Kaeng Krachan National Park ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Khao Yai National Park (Thailand, about 10%).
GBIF citizen-science records
It is estimated from how often the Alström's Warbler is recorded against all the birds logged in Kaeng Krachan National Park (243 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.
