Phylloscopus kansuensis
Silhouette: Jiekun He · PhyloPic
In 3 days ~30% in a week ~60%
The Gansu leaf warbler (Phylloscopus kansuensis) is a small passerine bird known only from China. It belongs to the leaf warbler genus Phylloscopus within the family Phylloscopidae. It was formerly treated as a subspecies of Pallas's warbler (P. proregulus) but is now regarded as a separate species based on differences in voice and cytochrome-b gene sequences.
It is 10 cm long, slightly larger than Pallas's warbler. It has greenish upperparts, pale underparts and a pale rump. The head has a long white supercilium and a pale stripe along the centre of the crown. The wings have one conspicuous wingbar, a slight second bar and whitish edges to the tertials.
The song is very different from Pallas's warbler and consists of a thin, high-pitched note followed by a series of accelerating notes and finally a trill. It is known to breed only in Gansu and Qinghai provinces in northern China. Its wintering grounds are uncertain but probably lie in Yunnan province in southern China. It is found up to 3,200 metres above sea-level in deciduous forest with some spruce and juniper. It is not currently known to be threatened with extinction and so is classed as a species of Least Concern by BirdLife International. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Jiuzhaigou National Park | 🇨🇳 China |
More parks will be added in future updates.
With luck
About 10% of wildlife watchers report a Gansu Leaf-Warbler sighting in Lanzhou on a given day, based on 8 verified sightings from GBIF citizen-science data. It is the 32nd most-seen of the 44 birds we can rate there. Over three days the chance rises to about 30%, and over a week to about 60%, if each day is a fresh chance.
April
In that month about 30% of wildlife watchers report a Gansu Leaf-Warbler in Lanzhou on a given day, against about 10% in May–July and December–February, the lowest months. March and October–November have too few records to rate.
2nd of 2
Of the 2 cities where we can rate Gansu Leaf-Warbler sightings, Lanzhou ranks 2nd at about 10%. The best odds are in Xining (China, about 20%).
Same order: Passeriformes
The closest relatives of the Gansu Leaf-Warbler that you can see in Lanzhou (order Passeriformes, Perching Birds) are Eurasian Tree Sparrow (about 90%), Oriental Magpie (about 80%) and Silver-throated Tit (about 80%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Gansu Leaf-Warbler is recorded against all the birds logged in Lanzhou (8 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.
