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Side-by-Side Comparison

Attribute	Dark Hawk-Cuckoo	Yellow-billed Malkoha
Scientific Name	Hierococcyx bocki	Rhamphococcyx calyorhynchus
Order	Cuculiformes	Cuculiformes
Family	Cuculidae	Cuculidae
Conservation Status	Least Concern	Least Concern
Length	—	—
Wingspan	35.9 cm (14.1 in)	35.2 cm (13.9 in)
Weight	137.0 g (4.83 oz)	117.0 g (4.13 oz)
Diet	--	--
Clutch Size	--	--
Population Trend	—	—

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Habitat Comparison

Shared Habitats

🌲 Forest

Dark Hawk-Cuckoo only

None

Yellow-billed Malkoha only

None

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Song & Call Comparison

Dark Hawk-Cuckoo

Song

Loud, raucous call with harsh quality; penetrating notes carrying through dense forest in South Asia.

Yellow-billed Malkoha

Song

Loud, far-carrying plaintive whistle; pure melodic notes audible through open tropical scrub habitat.

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Conservation Status

Least Concern

Dark Hawk-Cuckoo

Least Concern

Yellow-billed Malkoha

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How to Tell Them Apart

Dark Hawk-Cuckoo

Plumage

Dark Hawk-Cuckoo: dark brown above; pale below with dense dark barring; hawk-like; long barred tail; yellow orbital ring; dark morph

Yellow-billed Malkoha

Plumage

Reynaud's Coua: gray-brown above; white below with rufous flanks; bare blue facial skin; long dark tail; Madagascar forest endemic

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About These Birds

Dark Hawk-Cuckoo

Dark Hawk-Cuckoo (Hierococcyx bocki) — 28–31 cm. Dark grey above; pale below with darker streaking; barred tail. Restricted to montane forest of the Malay Peninsula. Brood parasite. Insectivore. Rare; poorly documented.

Yellow-billed Malkoha

Yellow-billed Malkoha (Rhamphococcyx calyorhynchus) — 45–50 cm. Bronze-green above; chestnut-red underparts; yellow bill; bare red orbital skin; long tail. Endemic to Sulawesi and nearby islands in primary and secondary forest. Non-parasitic. Insectivore.

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