The black-naped monarch or black-naped blue flycatcher (Hypothymis azurea) is a slim and agile passerine birdbelonging to the family of monarch flycatchers. They are sexually dimorphic with males having a distinctive black patch on the back of the head and a narrow black half collar (“necklace”) while the female is duller and lacks the black markings. They have a call that is similar to that of the Asian paradise flycatcher and in tropical forest habitats pairs may join mixed-species foraging flocks. Populations differ slightly in plumage colour and sizes.
The black-naped monarch breeds across tropical southern Asia from India and Sri Lanka east to Indonesia and thePhilippines. This species is usually found in thick forests and other well-wooded habitats.
The calls are a sharp and abrupt skrip. The main breeding season in India is in summer from May to July. Two to threeeggs are laid in a cup nest placed in the fork of a tree. The nest is decorated with spider egg-cases. source