Cettia brunnifrons
Silhouette: Jiekun He · PhyloPic
In 3 days <5% in a week ~10%
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 |
Rare
Under 5% of wildlife watchers report a Grey-sided Bush-Warbler sighting in Chitwan National Park on a given day, based on 11 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 297th most-seen of the 367 birds we can rate there. Over three days the chance rises to under 5%, and over a week to about 10%, if each day is a fresh chance.
January
In that month about 10% of wildlife watchers report a Grey-sided Bush-Warbler in Chitwan National Park on a given day, against under 5% in February to December, the lowest months. That is one of Chitwan National Park's driest months, with about 20 mm of rain against 660 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.
3rd of 5
Of the 5 parks where we can rate Grey-sided Bush-Warbler sightings, Chitwan National Park ranks 3rd at under 5%. The best odds are in Langtang National Park (Nepal, about 10%) and Jim Corbett National Park (India, 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 Chitwan National Park (11 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.
