Phylloscopus griseolus
Silhouette: Jiekun He · PhyloPic
In 3 days ~20% in a week ~50%
The sulphur-bellied warbler (Phylloscopus griseolus) is a species of leaf-warbler found in the Palearctic region (Afghanistan, Kazakhstan, Kyrgyzstan, Mongolia, Russian Federation [Central Asian Russia], Tajikistan and Turkmenistan). It was earlier also known by the name of olivaceous leaf-warbler.
Like other leaf-warblers, it gleans insects from small branches and leaves. It is found in rocky hill and scrub forest habitats. The species is found in small groups and has a tendency to forage low in the vegetation, sometimes even hopping on the ground. It has a single note cheep call. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Hemis National Park | 🇮🇳 India | |
| 2 | Gobi Gurvansaikhan National Park | 🇲🇳 Mongolia | |
| 3 | Satpura National Park | 🇮🇳 India | |
| 4 | Bandhavgarh National Park | 🇮🇳 India | |
| 5 | Ranthambore National Park | 🇮🇳 India | |
| 6 | Keoladeo National Park | 🇮🇳 India | |
| 7 | Kanha National Park | 🇮🇳 India | |
| 8 | Jim Corbett National Park | 🇮🇳 India |
With luck
About 10% of wildlife watchers report a Sulphur-bellied Warbler sighting in Gobi Gurvansaikhan National Park on a given day, based on 26 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 69th most-seen of the 122 birds we can rate there. Over three days the chance rises to about 20%, and over a week to about 50%, if each day is a fresh chance.
May–June and August
In those months about 10% of wildlife watchers report a Sulphur-bellied Warbler in Gobi Gurvansaikhan National Park on a given day, against under 5% in July, September and December, the lowest months. January–April and October–November have too few records to rate.
Between 7 and 10 am
Across all the parks we cover, that three-hour window holds the most Sulphur-bellied 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.
Among the best
Of the 8 parks where we can rate Sulphur-bellied Warbler sightings, Gobi Gurvansaikhan National Park ranks 2nd at about 10%, level with the leaders once rounded. The best odds are in Hemis National Park (India, about 10%).
Same genus: Phylloscopus
The closest relatives of the Sulphur-bellied Warbler that you can see in Gobi Gurvansaikhan National Park (genus Phylloscopus, Leaf Warblers) are Pallas's Leaf-Warbler (about 20%), Dusky Warbler (about 20%) and Arctic Warbler (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Sulphur-bellied Warbler is recorded against all the birds logged in Gobi Gurvansaikhan National Park (26 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.
