Hierococcyx

(_Hierococcyx varius_), there is no external difference between the sexes, while in others, such as the Indian koel (_Eudynamis honorata_), and the violet cuckoo (_Chrysococcyx xanthorhynchus_), the sexes are very dissimilar.

Birds of the Indian Hills Douglas Dewar 1916

These are known respectively as the large and the common hawk-cuckoo (_Hierococcyx sparverioides_ and _H. varius_).

Birds of the Indian Hills Douglas Dewar 1916

The hawk-cuckoo, or brain-fever bird (_Hierococcyx varius_), to which allusion has already been made, deposits its eggs in the nests of various species of babblers.

A Bird Calendar for Northern India Douglas Dewar 1916

The brain-fever bird (_Hierococcyx varius_) announces his arrival in the United Provinces by uttering an occasional

A Bird Calendar for Northern India Douglas Dewar 1916

The brain-fever bird (_Hierococcyx varius_) is now in full voice, and may be heard, both by day and by night, in all parts of Northern India, east of Umballa.

A Bird Calendar for Northern India Douglas Dewar 1916

_Hierococcyx varius_ and _Coccystes melanoleucus_.

The Nests and Eggs of Indian Birds, Volume 1 Allan Octavian Hume 1870