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.

It is found in eastern China, North and South Korea, far eastern Russia,  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.

References

northern hawk-cuckoo
Birds of East Asia
northern hawk-cuckoo
Taxa named by John Gould