Baby Dark-sided Flycatcher Demands Food
Maybe this is a Dark-sided Flycatcher (Japanese: Samebitaki) but since there are many similar birds, actually I am not sure.
The dark-sided flycatcher is a small passerine bird belonging to the genus Muscicapa in the Old World flycatcher family Muscicapidae. It has a wide breeding distribution in the East Palearctic with northern birds migrating south for the winter. It is also known as the Siberian flycatcher or sooty flycatcher, the latter name is also used for the sooty flycatcher of Africa.
The subspecies M. s. sibirica breeds in south-east Siberia westward to beyond Lake Baikal as well as in Mongolia, north-east China, North Korea and Japan (Hokkaidō and northern Honshū). M. s. rothschildi breeds in western China and Myanmar. M. s. gulmergi occurs from Afghanistan to Kashmir with M. s. cacabata from the eastern Himalayas to south-east Tibet and perhaps Myanmar.
The wintering range includes north-east India, Bangladesh, southern China, Taiwan and South-east Asia as far as Sumatra, Java, Borneo and the Philippines (Palawan and Culion). Vagrant birds have been recorded in Alaska, Iceland and Bermuda.
It inhabits coniferous and mixed forest and woodland and is sometimes seen in plantations, parks and gardens. It typically occurs in mountainous regions, reaching 4000 metres above sea-level in some areas.