Tarsiger cyanurus
Silhouette: Martin Bulla, based on François Desbordes' illustration · PhyloPic
In 3 days ~40% in a week ~70%
The red-flanked bluetail (Tarsiger cyanurus), also known as the orange-flanked bush-robin, is a small passerine bird in the Old World flycatcher family. It breeds in mixed coniferous forests in northern Asia, parts of central Asia, and northeastern Europe. It is migratory, wintering mainly in southeast Asia, in the Indian subcontinent, the Himalayas, Taiwan, and northern Indochina.
The red-flanked bluetail was formally described in 1773 as Motacilla cyanurus by the German naturalist Peter Simon Pallas based on specimens seen near the Yenisei river in Russia. The specific epithet combines the Ancient Greek κυανος/kuanos meaning "dark-blue" with -ουρος/-ouros meaning "-tailed". The red-flanked bluetail is now placed in the genus Tarsiger that was introduced in 1845 by the English naturalist Brian Houghton Hodgson. The genus name is from Ancient Greek tarsos, "flat of the foot" and Latin gerere, "to carry".
The red-flanked bluetail belongs to a group of insectivorous birds known as chats, that were formerly thought to be thrushes. Genetic analysis showed that they were in fact a type of Old World flycatcher, with the resemblance to thrushes being the result of convergent... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Nikko National Park | 🇯🇵 Japan | |
| 2 | Cuc Phuong National Park | 🇻🇳 Vietnam | |
| 3 | Taroko National Park | 🇹🇼 Taiwan | |
| 4 | Doi Inthanon National Park | 🇹🇭 Thailand |
Possible
About 20% of wildlife watchers report a Red-flanked Bluetail sighting in Chengdu on a given day, based on 108 verified sightings from GBIF citizen-science data. It is the 25th most-seen of the 156 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 and March
In those months about 40% of wildlife watchers report a Red-flanked Bluetail in Chengdu on a given day, against under 5% in April–June and September, the lowest months. Those are among Chengdu's driest months, with about 25 mm of rain a month against 270 mm in August.
Between 2 and 5 pm
Across all the parks we cover, that three-hour window holds the most Red-flanked Bluetail sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
11th of 34
Of the 34 cities where we can rate Red-flanked Bluetail sightings, Chengdu ranks 11th at about 20%. The best odds are in Changsha (China, about 30%), Shanghai (China, about 30%) and Nanjing (China, about 30%).
GBIF citizen-science records
It is estimated from how often the Red-flanked Bluetail is recorded against all the birds logged in Chengdu (108 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.
