Northern hawk-cuckoo

The northern hawk-cuckoo, rufous hawk-cuckoo, or Horsfield's hawk-cuckoo (Hierococcyx hyperythrus) is a bird in the family Cuculidae formerly thought to be conspecific with Hodgson's hawk-cuckoo (Hierococcyx fugax) and placed in the genus Cuculus.

Northern hawk-cuckoo
Conservation status
Least Concern  (IUCN 3.1)[1]
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Aves
Order:	Cuculiformes
Family:	Cuculidae
Genus:	Hierococcyx
Species:	H. hyperythrus
Binomial name
Hierococcyx hyperythrus (Gould, 1856)

It is found in eastern China, North and South Korea, far eastern Russia,^[2] and Japan. Northern populations winter in Borneo.

Juvenile northern hawk-cuckoos have a yellow skin patch on the underside of each wing, which parents use to detect whether offspring are begging for food.^[3]