Red-flanked Bluetail

The red-flanked bluetail is 13–14 centimetres long and weighs 10–18 grams, similar in size to the common redstart and slightly smaller and slimmer than the European robin. Both sexes have a blue tail and rump, orange-red flanks, a white throat, greyish-white underparts, a small thin black bill and slender black legs. The adult male also has dark blue upperparts, while females and immature males are plain brown above apart from the blue rump and tail, and have dusky breasts. It is also called the orange-flanked bush-robin. (Wikipedia, general species account)

The red-flanked bluetail breeds in mixed coniferous forests with undergrowth in northeastern Europe, from northern Sweden east across Siberia to Kamchatka and south to Japan, and also in parts of central Asia. It is migratory, wintering mainly in southeastern Asia, the Indian subcontinent, the Himalayas, Taiwan and northern Indochina. The breeding range is slowly expanding westwards through Finland, and it is a rare but increasing vagrant to western Europe. (Wikipedia, general species account)