Hodgson's hawk-cuckoo (''Hierococcyx nisicolor''), also known as the whistling hawk-cuckoo is a species of

cuckoo Cuckoos are birds in the Cuculidae ( ) family, the sole taxon in the order Cuculiformes ( ). The cuckoo family includes the common or European cuckoo, roadrunners, koels, malkohas, couas, coucals, and anis. The coucals and anis are somet ...

found in north-eastern

India India, officially the Republic of India, is a country in South Asia. It is the List of countries and dependencies by area, seventh-largest country by area; the List of countries by population (United Nations), most populous country since ...

Myanmar Myanmar, officially the Republic of the Union of Myanmar; and also referred to as Burma (the official English name until 1989), is a country in northwest Southeast Asia. It is the largest country by area in Mainland Southeast Asia and has ...

, southern

China China, officially the People's Republic of China (PRC), is a country in East Asia. With population of China, a population exceeding 1.4 billion, it is the list of countries by population (United Nations), second-most populous country after ...

and

southeast Asia Southeast Asia is the geographical United Nations geoscheme for Asia#South-eastern Asia, southeastern region of Asia, consisting of the regions that are situated south of China, east of the Indian subcontinent, and northwest of the Mainland Au ...

. Hodgson's hawk-cuckoo is a

brood parasite Brood may refer to: Nature * Brood, a collective term for offspring * Brooding, the incubation of bird eggs by their parents * Bee brood, the young of a beehive * Individual broods of North American periodical cicadas: ** Brood X, the largest ...

. The chick evicts bona fide residents of the parasitized nest, thus becoming the sole occupant. Under normal circumstances, this would reduce the provisioning rate as the foster parents see only one gape. To counteract this, the Hodgson's hawk-cuckoo displays gape-coloured patches of skin under its wing to simulate additional gapes; the strategy appears to increase the provisioning rate. This is in contrast to other species of cuckoo (such as the

common cuckoo The cuckoo, common cuckoo, European cuckoo or Eurasian cuckoo (''Cuculus canorus'') is a member of the cuckoo order of birds, Cuculiformes, which includes the Geococcyx, roadrunners, the ani (bird), anis and the coucals. This species is a widesp ...

) which increase the rapidity of high pitched hunger calls to increase the provisioning rate. Although the skin patch is not gape shaped, it is convincing: host parents occasionally place food into the patch. Hodgson's hawk-cuckoo was formerly regarded as having four

subspecies In Taxonomy (biology), biological classification, subspecies (: subspecies) is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (Morphology (biology), morpholog ...

. The Philippine hawk-cuckoo is now commonly treated as a separate species, ''H. pectoralis''. The remaining forms are also now split into three species: Malaysian hawk-cuckoo (''H. fugax''), Hodgson's hawk-cuckoo (''H. nisicolor'') and rufous hawk-cuckoo or northern hawk-cuckoo (''H. hyperythrus''). The common name commemorates the British naturalist

Brian Houghton Hodgson Brian Houghton Hodgson (1 February 1801 – 23 May 1894) was a pioneer natural history, naturalist and ethnologist working in India and Nepal where he was a British Resident (title), Resident. He described numerous species of birds and mammals fr ...

References

{{Taxonbar, from=Q2998690 Hierococcyx Birds of Eastern Himalaya Birds of South China Birds of Hainan Birds of Myanmar Birds of Thailand Birds of Laos Birds of Vietnam Birds described in 1821 Taxobox binomials not recognized by IUCN Taxa named by Thomas Horsfield