Northern hawk-cuckoo
{{short description|Species of bird}}
{{speciesbox
| image = BirdsAsiaJohnGoVIGoul 0180.jpg
| status = LC
| status_system = IUCN3.1
| genus = Hierococcyx
| species = hyperythrus
| authority = (Gould, 1856)
}}
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,There is no evidence of this species on Sakhalin island according to Russian sources: (Гизенко А. И. Птицы Сахалинской области, М. Изд-во АН СССР, 1955. 324 с.; Судиловская А. М. 1951. Отряд Кукушки. // Птицы Советского Союза. Том 1, Под общ. ред. Г. П. Дементьева, Н. А. Гладкова. М.: Советская Наука. С. 46; Флинт В. Е., Бёме Р. Л., Костин Ю. В., Кузнецов А. А. Птицы СССР. М.: Мысль. 1968. С. 348-350.) 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.{{Cite journal |last=Rojas Ripari |first=Juan M. |last2=Ursino |first2=Cynthia A. |last3=Reboreda |first3=Juan C. |last4=De Mársico |first4=María C. |date=2021-12-03 |title=Tricking Parents: A Review of Mechanisms and Signals of Host Manipulation by Brood-Parasitic Young |url=http://dx.doi.org/10.3389/fevo.2021.725792 |journal=Frontiers in Ecology and Evolution |volume=9 |doi=10.3389/fevo.2021.725792 |issn=2296-701X|doi-access=free }}