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Side-by-Side Comparison

Attribute	Dark Hawk-Cuckoo	Northern Hawk-Cuckoo
Scientific Name	Hierococcyx bocki	Hierococcyx hyperythrus
Order	Cuculiformes	Cuculiformes
Family	Cuculidae	Cuculidae
Conservation Status	Least Concern	Least Concern
Length	—	—
Wingspan	35.9 cm (14.1 in)	39.7 cm (15.6 in)
Weight	137.0 g (4.83 oz)	120.15 g (4.24 oz)
Diet	--	--
Clutch Size	--	--
Population Trend	—	—

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Habitat Comparison

Shared Habitats

🌲 Forest

Dark Hawk-Cuckoo only

None

Northern Hawk-Cuckoo 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.

Northern Hawk-Cuckoo

Song

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

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Conservation Status

Least Concern

Dark Hawk-Cuckoo

Least Concern

Northern Hawk-Cuckoo

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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

Northern Hawk-Cuckoo

Plumage

Northern Hawk-Cuckoo: gray-brown above; white below with rufous streaking; hawk-like; long tail; yellow eye-ring; northern Asia

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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.

Northern Hawk-Cuckoo

Northern Hawk-Cuckoo (Hierococcyx hyperythrus) — 29–32 cm. Grey above; rufous-orange breast graduating to barred belly; barred tail. Breeds in Russia and Korea; winters to Southeast Asia. Brood parasite targeting bush-warblers and flycatchers. Insectivore. Long-distance migrant.

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