Monticola rufiventris
Silhouette: Martin Bulla, based on François Desbordes' illustration · PhyloPic
In 3 days ~10% in a week ~20%
The chestnut-bellied rock thrush (Monticola rufiventris) is a species of passerine bird in the Old World flycatcher family Muscicapidae. The chestnut-bellied rock thrush is 21–23 cm (8.3–9.1 in) in overall length and weighs 48–61 g (1.7–2.2 oz). The male has a blue-grey crown and upperparts with darker lores and throat. The undersides are deep chestnut. The female has dull grey-brown upperparts and scalloped slate-grey with buffy-white underparts. The eyering and the post-auricular patch are whitish-buff.
Its natural habitat is temperate forests. It is an altitudanal migrant and experiences Zugunruhe strongly the night before migration. It is native to the Himalayas, Purvanchal Range and southern China; some birds winter to northern Indochina.
The chestnut-bellied rock thrush was formally described in 1832 by the Irish zoologist Nicholas Vigors under the binomial name Turdus erythogaster. The identical name had been used for a different species by the Dutch naturalist Pieter Boddaert in 1783. The chestnut-bellied rock thrush was described again in 1833 by the English naturalists William Jardine and Prideaux John Selby under... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Langtang National Park | 🇳🇵 Nepal | |
| 2 | Royal Manas National Park | 🇧🇹 Bhutan | |
| 3 | Doi Inthanon National Park | 🇹🇭 Thailand | |
| 4 | Manas National Park | 🇮🇳 India | |
| 5 | Namdapha National Park | 🇮🇳 India | |
| 6 | Jim Corbett National Park | 🇮🇳 India |
Rare
Under 5% of wildlife watchers report a Chestnut-bellied Rock-Thrush sighting in Chengdu on a given day, based on 20 verified sightings from GBIF citizen-science data. It is the 83rd most-seen of the 156 birds we can rate there. Over three days the chance rises to about 10%, and over a week to about 20%, if each day is a fresh chance.
January and October
In those months about 10% of wildlife watchers report a Chestnut-bellied Rock-Thrush in Chengdu on a given day, against under 5% in February–September and November–December, the lowest months. Those are among Chengdu's driest months, with about 40 mm of rain a month against 270 mm in August.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Chestnut-bellied Rock-Thrush 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 2 cities where we can rate Chestnut-bellied Rock-Thrush sightings, Chengdu has the highest daily chance: under 5%. Next come Kathmandu (Nepal, under 5%).
Same family: Muscicapidae
The closest relatives of the Chestnut-bellied Rock-Thrush that you can see in Chengdu (family Muscicapidae, Old World Flycatchers, Robins, and Chats) are Oriental Magpie-Robin (about 70%), Red-flanked Bluetail (about 20%) and Daurian Redstart (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Chestnut-bellied Rock-Thrush is recorded against all the birds logged in Chengdu (20 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.
