The grey-headed canary-flycatcher sometimes known as the grey-headed flycatcher (Culicicapa ceylonensis) is a species of small flycatcher-like bird found in tropical Asia. It has a square crest, a grey hood and yellow underparts. They are found mainly in forested habitats where they often join other birds in mixed-species foraging flocks. Pairs are often seen as they forage for insects by making flycatcher-like sallies and calling aloud. Several subspecies are recognized within their wide distribution range. In the past the genus Culicicapa was considered to be an Old World flycatcher but studies have found them to belong to a new family designated as the Stenostiridae or fairy flycatchers that include the African genera Stenostira and Elminia.
This species breeds in upland to montane oak (Quercus) and other broadleaved forests and similar wooded areas in temperate to tropical southern Asia, from Pakistan, Central India and Sri Lanka east to Indonesia and southern China. Many populations are resident, but some Himalayan birds are partial migrants that winter in peninsular India sometimes even occurring in arid habitats. Other populations may make altitudinal movements but in parts of the eastern Himalayas such as Bhutan, they have been found to occur all year round, and can be found up to and above 2,000 m ASL. source