Phylloscopus coronatus
Silhouette: Jiekun He · PhyloPic
In 3 days ~20% in a week ~40%
The eastern crowned warbler (Phylloscopus coronatus) is a species of Old World warbler in the family Phylloscopidae. It inhabits boreal and temperate forests in the east Palearctic. The eastern crowned warbler is a medium-sized, rather robust and brightly coloured leaf warbler. It is dark olive-green above and white below with a strong head pattern of dark, grey lateral crown stripes with an indistinct yellowish median crown stripe. It also has a long yellowish-white supercilium with a dark stripe through the eye and dark lores and dusky yellow cheeks. It has a single pale wingbar. The square tail shows a slight fork. It has quite a strong, robust, pale-coloured bill and dark legs.
The eastern crowned warbler breeds in eastern Siberia from the Argun River eastwards and southwards into western Manchuria and into central Sichuan, the Korean Peninsula and Japan. It winters in south-east Asia from eastern India and Bangladesh to Java. It has occurred as a vagrant in western Europe with the first record for Great Britain being in County Durham in 2009; this was the fifth record for the Western Palearctic (UK and Scandinavia). Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Nikko National Park | 🇯🇵 Japan | |
| 2 | Khao Sok National Park | 🇹🇭 Thailand | |
| 3 | Khao Luang National Park | 🇹🇭 Thailand | |
| 4 | Kaeng Krachan National Park | 🇹🇭 Thailand | |
| 5 | Taman Negara National Park | 🇲🇾 Malaysia | |
| 6 | Kerinci Seblat National Park | 🇮🇩 Indonesia | |
| 7 | Khao Yai National Park | 🇹🇭 Thailand | |
| 8 | Cuc Phuong National Park | 🇻🇳 Vietnam |
With luck
About 10% of wildlife watchers report an Eastern Crowned-Warbler sighting in Hanoi on a given day, based on 13 verified sightings from GBIF citizen-science data. It is the 57th most-seen of the 97 birds we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
September
In that month about 30% of wildlife watchers report an Eastern Crowned-Warbler in Hanoi on a given day, against under 5% in May–August and October–March, the lowest months. That is one of Hanoi's wettest months, with about 220 mm of rain against 20 mm in February.
Between 3 and 6 am
Across all the parks we cover, that three-hour window holds the most Eastern Crowned-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.
5th of 22
Of the 22 cities where we can rate Eastern Crowned-Warbler sightings, Hanoi ranks 5th at about 10%. The best odds are in Sapporo (Japan, about 20%), Daejeon (South Korea, about 10%) and Busan (South Korea, about 10%).
Same genus: Phylloscopus
The closest relatives of the Eastern Crowned-Warbler that you can see in Hanoi (genus Phylloscopus, Leaf Warblers) are Yellow-browed Warbler (about 60%), Dusky Warbler (about 30%) and Two-barred Warbler (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Eastern Crowned-Warbler is recorded against all the birds logged in Hanoi (13 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.
