Phylloscopus proregulus
Silhouette: Margot Michaud · PhyloPic
In 3 days ~40% in a week ~70%
Pallas's leaf warbler (Phylloscopus proregulus) or Pallas's warbler is a bird that breeds in mountain forests from southern Siberia east to northern Mongolia and northeast China. It is named after the German zoologist Peter Simon Pallas, who first formally described it. This leaf warbler is strongly migratory, wintering mainly in south China and adjacent areas of southeast Asia, although in recent decades increasing numbers have been found in Europe in autumn.
Pallas's leaf warbler is one of the smallest Palearctic warblers, with a relatively large head and short tail. It has greenish upperparts and white underparts, a lemon-yellow rump, and yellow double wingbars, supercilia and central crown stripe. It is similar in appearance to several other Asian warblers, including some that were formerly considered to be subspecies of it, although its distinctive vocalisations aid identification.
The female builds a cup nest in a tree or bush, and incubates the four to six eggs, which hatch after 12–13 days. The chicks are fed mainly by the female and fledge when they are 12–14 days old; both parents then bring food for about a week. Pallas's leaf warbler is insectivorous, feeding on the adults, larvae and pupae of small insects and spiders. Birds forage in bushes and trees, picking items from leaves or catching prey in short flights or while hovering. The Pallas's leaf warbler has a large range, and its numbers are believed to be stable. It therefore is evaluated as of "least concern" by the International Union for Conservation of Nature (IUCN). Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Gobi Gurvansaikhan National Park | 🇲🇳 Mongolia | |
| 2 | Doi Inthanon National Park | 🇹🇭 Thailand |
Possible
About 20% of wildlife watchers report a Pallas's Leaf-Warbler sighting in Tuen Mun on a given day, based on 196 verified sightings from GBIF citizen-science data. It is the 53rd most-seen of the 183 birds we can rate there. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.
February
In that month about 50% of wildlife watchers report a Pallas's Leaf-Warbler in Tuen Mun on a given day, against under 5% in April to November, the lowest months. That is one of Tuen Mun's driest months, with about 30 mm of rain against 290 mm in June.
Between 9 am and noon
Across all the parks we cover, that three-hour window holds the most Pallas's Leaf-Warbler sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
21st of 38
Of the 38 cities where we can rate Pallas's Leaf-Warbler sightings, Tuen Mun ranks 21st at about 20%. The best odds are in Shijiazhuang (China, about 30%), Changsha (China, about 30%) and Guiyang (China, about 30%).
Same genus: Phylloscopus
The closest relatives of the Pallas's Leaf-Warbler that you can see in Tuen Mun (genus Phylloscopus, Leaf Warblers) are Dusky Warbler (about 30%) and Yellow-browed Warbler (about 30%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Pallas's Leaf-Warbler is recorded against all the birds logged in Tuen Mun (196 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.
