Red-flanked bluetail 
(Tarsiger cyanurus, Oanh đuôi cụt lưng xanh), also known as the orange-flanked bush-robin

The red-flanked bluetail (Tarsiger cyanurus), also known as the orange-flanked bush-robin, is a small passerine bird of the Old World flycatcher family, Muscicapidae.
The bird is a migratory species breeding in northern Asia and northeastern Europe, from Finland east across Siberia to Kamchatka and south to Japan.
The species winters mainly in southeastern Asia, in the Indian Subcontinent, the Himalayas, Taiwan, and northern Indochina. 

The genus name is from Ancient Greek tarsos, "flat of the foot" and Latin gerere, "to carry".
cyanura, cyanurus Greek kuanos dark-blue; -ouros -tailed (oura tail).