Cettia brunnifrons
Silhouette: Jiekun He · PhyloPic
In 3 days ~20% in a week ~50%
The grey-sided bush warbler (Cettia brunnifrons) is a species of bush warbler (family Cettiidae). It was formerly included in the "Old World warbler" assemblage. It is found from northern Pakistan to central China. The phylogenetic relationships among the Cettia species are shown below, based on the data by the Cornell Lab of Ornithology.
It split from the Cetti's warbler about 5 million years ago. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Langtang National Park | 🇳🇵 Nepal | |
| 2 | Jim Corbett National Park | 🇮🇳 India | |
| 3 | Chitwan National Park | 🇳🇵 Nepal | |
| 4 | Royal Manas National Park | 🇧🇹 Bhutan | |
| 5 | Manas National Park | 🇮🇳 India |
With luck
About 10% of wildlife watchers report a Grey-sided Bush-Warbler sighting in Langtang National Park on a given day, based on 36 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 112th most-seen of the 225 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 and December
In those months about 20% of wildlife watchers report a Grey-sided Bush-Warbler in Langtang National Park on a given day, against under 5% in January–February, July and September, the lowest months. Those are among Langtang National Park's driest months, with about 70 mm of rain a month against 390 mm in July.
Between 7 and 10 am
Across all the parks we cover, that three-hour window holds the most Grey-sided Bush-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.
Yes
Of the 5 parks where we can rate Grey-sided Bush-Warbler sightings, Langtang National Park has the highest daily chance: about 10%. Next come Jim Corbett National Park (India, under 5%) and Chitwan National Park (Nepal, under 5%).
GBIF citizen-science records
It is estimated from how often the Grey-sided Bush-Warbler is recorded against all the birds logged in Langtang National Park (36 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.
