Phylloscopus chloronotus
Silhouette: Jiekun He · PhyloPic
In 3 days ~50% in a week ~80%
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 |
Possible
About 20% of wildlife watchers report a Pale-rumped Warbler sighting in Langtang National Park on a given day, based on 83 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 44th most-seen of the 225 birds we can rate there. Over three days the chance rises to about 50%, and over a week to about 80%, if each day is a fresh chance.
July
In that month about 60% of wildlife watchers report a Pale-rumped Warbler in Langtang National Park on a given day, against about 10% in April, June and August–September, the lowest months. That is one of Langtang National Park's wettest months, with about 390 mm of rain against 10 mm in November.
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.
Yes
Of the 4 parks where we can rate Pale-rumped Warbler sightings, Langtang National Park has the highest daily chance: about 20%. Next come Royal Manas National Park (Bhutan, about 10%) and Jim Corbett National Park (India, about 10%).
Same genus: Phylloscopus
The closest relatives of the Pale-rumped Warbler that you can see in Langtang National Park (genus Phylloscopus, Leaf Warblers) are Grey-hooded Warbler (about 40%), Buff-barred Warbler (about 30%) and Ashy-throated Warbler (about 30%), 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 Langtang National Park (83 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.
