Introduction
Hodgson’s Hawk-Cuckoo, also known as the Whistling Hawk-Cuckoo, is a medium-sized cuckoo of the family Cuculidae. Its accepted scientific name is Hierococcyx nisicolor. It is best known for its hawk-like appearance, far-carrying whistle and secretive habits in wooded landscapes.
Physical Description
Hodgson’s Hawk-Cuckoo measures approximately 27–31 centimetres in length. Adults have slate-grey to bluish-grey upperparts, pale underparts marked with diffuse greyish or rufous streaking, a prominent yellow orbital ring and a barred tail. The tail usually shows a broad dark subterminal band, with a narrower pale band above it and rufous tones near the tip.
Juveniles are more strongly marked. They may have brown upperparts, a dark hood, pale-edged feathers and heavily spotted or streaked underparts. The tail pattern is also less cleanly defined than in adults. No strong sexual dimorphism is generally recognised, although plumage variation can make age and individual identification difficult.
The wings and tail give the species a hawk-like outline, an appearance shared by several Hierococcyx cuckoos. Its call is a distinctive, penetrating whistle, often delivered as two hoarse notes and sometimes followed by a rapid series of rougher notes.
Range and Habitat
Hodgson’s Hawk-Cuckoo breeds from Nepal and the eastern Himalayas through north-eastern India, Myanmar and Indochina to southern China, including Hainan. Its range extends through parts of Thailand, Laos, Vietnam and Cambodia. Many birds are migratory or seasonally mobile, with wintering records extending south through the Thai-Malay Peninsula to Sumatra, Java and Borneo.
It occupies closed-canopy forest, mature secondary woodland, forest edge and dense shrubland. In Hong Kong, it is associated particularly with closed-canopy woodland and mixed shrubland, while passage migrants may also appear in wooded parks and gardens. The species occurs from lowlands into hill forests, although local elevation limits vary across its range.
Where to See This Species
Tai Po Kau Nature Reserve, New Territories, Hong Kong
Tai Po Kau is one of the best-documented localities for Hodgson’s Hawk-Cuckoo in Hong Kong. The species is recorded there as a spring and summer visitor in closed-canopy woodland, with most observations occurring from March to May. Listening for its whistle is often more productive than searching the canopy for a quiet bird.
Nearby accommodation: Tai Po and Sha Tin provide practical bases with hotels, guest houses and other urban accommodation.
Doi Inthanon National Park, Chiang Mai Province, Thailand
Hodgson’s Hawk-Cuckoo is included in documented wildlife records for Doi Inthanon National Park. The park’s extensive forest, elevation range and seasonal bird diversity make it a reasonable place to look, particularly in suitable woodland during the warmer months. Local sightings can be unpredictable, and the species is more often detected by voice than by a prolonged view.
Nearby accommodation: Chom Thong and the park entrance area offer guest houses, small hotels, cabins and campsites.
Phu Khiao Wildlife Sanctuary, Chaiyaphum Province, Thailand
The species is listed in biodiversity records for Phu Khiao Wildlife Sanctuary, which protects extensive forest habitat in north-eastern Thailand. Visitors should concentrate on mature forest and forest margins, especially during periods when calling birds are active.
Nearby accommodation: Chaiyaphum and nearby district towns provide hotels, guest houses and simple self-catering accommodation.
Behaviour and Diet
Hodgson’s Hawk-Cuckoo is generally solitary and secretive. Adults may sing from within the canopy or during flight, with calling activity often strongest in the early morning and around sunset. The species may also call at night. Its hawk-like shape and barred tail are thought to contribute to the resemblance that gives hawk-cuckoos their common name, but the original article’s suggestion that this is definitely protective mimicry should be treated cautiously.
The diet consists mainly of invertebrates, including caterpillars and other insects. The bird usually forages from elevated perches and within leafy vegetation, where its subdued plumage helps it remain inconspicuous.
Like other cuckoos, it is a brood parasite. The female lays in the nest of another bird, leaving the host to incubate the egg and feed the young. Documented observations in Hong Kong include fledged juveniles being attended or fed by Hainan Blue Flycatchers, although host relationships may vary geographically and are not fully known throughout the species’ range.
Identification Tips
- Look for a medium-sized, slender cuckoo with slate-grey upperparts, pale streaked underparts and a bright yellow eye-ring.
- The barred tail has a broad dark subterminal band and is useful when the bird is perched or flying away.
- Adults usually show diffuse streaking rather than the strong flank barring associated with some larger hawk-cuckoos.
- Juveniles are browner and more heavily marked, with a darker hood and stronger spotting or streaking below.
- Hodgson’s Hawk-Cuckoo is smaller and shorter-tailed than the Large Hawk-Cuckoo, Hierococcyx sparverioides.
- In areas where the Malaysian Hawk-Cuckoo, Hierococcyx fugax, occurs, the narrower pale band immediately above Hodgson’s Hawk-Cuckoo’s dark subterminal tail band can help with identification.
- The distinctive whistle is often the first indication that the species is present.
Conservation Status
Hodgson’s Hawk-Cuckoo is currently assessed as Least Concern on the IUCN Red List. It has a broad distribution across South and Southeast Asia, but its population trend is reported as decreasing. Habitat loss, forest fragmentation and the conversion of mature woodland for agriculture or development remain potential pressures, particularly where the species depends on closed-canopy forest.
Protecting remaining forest, maintaining connected woodland and safeguarding known breeding and migratory sites are important conservation measures. Further monitoring is also needed because the species is secretive and population estimates are limited.
Frequently Asked Questions
What is the scientific name of Hodgson’s Hawk-Cuckoo?
The accepted scientific name is Hierococcyx nisicolor. It belongs to the cuckoo family, Cuculidae.
Where does Hodgson’s Hawk-Cuckoo live?
It breeds from Nepal and the eastern Himalayas through north-eastern India, Myanmar, Indochina and southern China. Some birds move south in winter to the Thai-Malay Peninsula and the Greater Sundas.
Is Hodgson’s Hawk-Cuckoo migratory?
It is seasonally migratory or mobile in much of its range. Breeding populations in northern areas may move south after the breeding season, while some birds remain resident or make shorter local movements.
What does Hodgson’s Hawk-Cuckoo eat?
Its diet consists mainly of insects and other invertebrates, including caterpillars. It usually searches through forest vegetation from concealed perches.
Does Hodgson’s Hawk-Cuckoo build its own nest?
No. It is a brood parasite and lays its eggs in the nests of other birds. The host species incubates the egg and raises the cuckoo chick.
How can Hodgson’s Hawk-Cuckoo be identified?
Listen for its far-carrying whistle and look for a slate-grey cuckoo with pale, streaked underparts, a yellow orbital ring and a barred tail with a broad dark subterminal band.
References
- IOC World Bird List
- IUCN Red List of Threatened Species
- Hong Kong Bird Watching Society
Related posts
