Phylloscopus plumbeitarsus
Silhouette: Jiekun He · PhyloPic
In 3 days ~10% in a week ~30%
The two-barred warbler (Phylloscopus plumbeitarsus) is a bird of the leaf warbler family (Phylloscopidae). The species was first described by Robert Swinhoe in 1861. It was formerly included in the "Old World warbler" assemblage. It is closely related to the greenish warbler, to which it was formerly considered conspecific.
It is found in northern Mongolia, Manchuria and southern Siberia. They are a migratory species. Before the autumn migration, both adults and juveniles molt. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Khao Yai National Park | 🇹🇭 Thailand | |
| 2 | Kaeng Krachan National Park | 🇹🇭 Thailand | |
| 3 | Cat Tien National Park | 🇻🇳 Vietnam | |
| 4 | Doi Inthanon National Park | 🇹🇭 Thailand | |
| 5 | Gobi Gurvansaikhan National Park | 🇲🇳 Mongolia | |
| 6 | Khao Luang National Park | 🇹🇭 Thailand |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Hanoi | 🇻🇳 Vietnam | |
| 2 | Beijing | 🇨🇳 China | |
| 3 | Hong Kong | 🇨🇳 China | |
| 4 | Tuen Mun | 🇨🇳 China | |
| 5 | Bangkok | 🇹🇭 Thailand | |
| 6 | Phnom Penh | 🇰🇭 Cambodia | |
| 7 | Ho Chi Minh City | 🇻🇳 Vietnam | |
| 8 | Guangzhou | 🇨🇳 China | |
| 9 | Taipei | 🇹🇼 Taiwan | |
| 10 | Singapore | 🇸🇬 Singapore |
With luck
About 10% of wildlife watchers report a Two-barred Warbler sighting in Beijing on a given day, based on 381 verified sightings from GBIF citizen-science data. It is the 100th most-seen of the 324 birds we can rate there. Over three days the chance rises to about 10%, and over a week to about 30%, if each day is a fresh chance.
May and September
In those months about 20% of wildlife watchers report a Two-barred Warbler in Beijing on a given day, against under 5% in July and October–April, the lowest months.
Between 6 and 9 am
Across all the parks we cover, that three-hour window holds the most Two-barred Warbler sightings with a recorded time, and about half of them come between 6 am and 6 pm: it is most active around dawn and dusk.
Among the best
Of the 10 cities where we can rate Two-barred Warbler sightings, Beijing ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Hanoi (Vietnam, about 10%).
Same genus: Phylloscopus
The closest relatives of the Two-barred Warbler that you can see in Beijing (genus Phylloscopus, Leaf Warblers) are Yellow-browed Warbler (about 20%), Pallas's Leaf-Warbler (about 20%) and Dusky Warbler (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Two-barred Warbler is recorded against all the birds logged in Beijing (381 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.
