Phylloscopus chloronotus
Silhouette: Jiekun He · PhyloPic
In 3 days ~20% in a week ~40%
The Lemon-rumped Warbler (Phylloscopus chloronotus), also known as the Pale-rumped Warbler, is a small species of Old World warbler in the family Phylloscopidae. It is native to the Himalayas, breeding in montane forests and wintering in the southern foothills and the Purvanchal Range. The species is structurally identical to the Sichuan Leaf Warbler (Phylloscopus forresti), but differs in vocalizations.
The Lemon-rumped Warbler was once grouped with the Sichuan Leaf Warbler (Phylloscopus forresti) and was previously classified within P. proregulus. Vocal and genetic studies confirmed its separation as a distinct species. Related taxa in China, including P. kansuensis and P. yunnanensis, are also now recognized as separate.
The Lemon-rumped Warbler is 9–10 cm long and weighs about 4.6–5.1 g. It has a whitish crown stripe bordered by darker olive-brown sides, a pale line above the eye, and a dark eyestripe that often curves downward. The upperparts are greenish-grey, and the rump is yellowish or whitish, which gives the species its name. The wings are grey-brown with green edging and usually show one or two pale wingbars. The underparts are whitish or... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Langtang National Park | 🇳🇵 Nepal | |
| 2 | Royal Manas National Park | 🇧🇹 Bhutan | |
| 3 | Jim Corbett National Park | 🇮🇳 India | |
| 4 | Manas National Park | 🇮🇳 India |
With luck
About 10% of wildlife watchers report a Pale-rumped Warbler sighting in Royal Manas National Park on a given day, based on 76 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 161st most-seen of the 388 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.
December
In that month about 20% of wildlife watchers report a Pale-rumped Warbler in Royal Manas National Park on a given day, against under 5% in February and April–June, the lowest months. That is one of Royal Manas National Park's driest months, with about 10 mm of rain against 930 mm in July. August and September have too few records to rate.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Pale-rumped Warbler sightings with a recorded time, and about 6 in 10 of them come between 6 am and 6 pm: it is most active around dawn and dusk.
2nd of 4
Of the 4 parks where we can rate Pale-rumped Warbler sightings, Royal Manas National Park ranks 2nd at about 10%. The best odds are in Langtang National Park (Nepal, about 20%).
Same genus: Phylloscopus
The closest relatives of the Pale-rumped Warbler that you can see in Royal Manas National Park (genus Phylloscopus, Leaf Warblers) are Yellow-vented Warbler (about 30%), Grey-hooded Warbler (about 30%) and Yellow-browed Warbler (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Pale-rumped Warbler is recorded against all the birds logged in Royal Manas National Park (76 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.
