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Side-by-Side Comparison

Attribute	Black-billed Coucal	Rufous-winged Ground-cuckoo
Scientific Name	Centropus bernsteini	Neomorphus rufipennis
Order	Cuculiformes	Cuculiformes
Family	Cuculidae	Cuculidae
Conservation Status	Least Concern	Least Concern
Length	—	—
Wingspan	37.2 cm (14.6 in)	34.1 cm (13.4 in)
Weight	162.5 g (5.73 oz)	381.25 g (13.45 oz)
Diet	--	--
Clutch Size	2	--
Population Trend	—	—

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Habitat Comparison

Shared Habitats

None

Black-billed Coucal only

🌾 Grassland

Rufous-winged Ground-cuckoo only

🌲 Forest

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Song & Call Comparison

Black-billed Coucal

Song

Loud, clear whistled call with carrying quality; rich musical notes audible through dense humid forest.

Rufous-winged Ground-cuckoo

Song

Deep, hollow resonant call; powerful low-frequency sound carrying across dense lowland tropical forest floor.

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Conservation Status

Least Concern

Black-billed Coucal

Least Concern

Rufous-winged Ground-cuckoo

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How to Tell Them Apart

Black-billed Coucal

Plumage

White-browed Coucal: white supercilium stripe; brown-streaked above; rufous wings; pale buff below; long dark tail; red eye

Rufous-winged Ground-cuckoo

Plumage

Pheasant Coucal: dark glossy black head and body; rufous-brown wings; strongly barred dark tail; reddish eye; terrestrial habits

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About These Birds

Black-billed Coucal

Black-billed Coucal (Centropus bernsteini) — 40–44 cm. Rufous-chestnut back and wings; black head and underparts; all-black bill. Restricted to northern and western New Guinea in lowland forest and scrub. Non-parasitic. Omnivore.

Rufous-winged Ground-cuckoo

Rufous-winged Ground-cuckoo (Neomorphus rufipennis) — 46–50 cm. Bronze-green above; rufous wing panels; pale buff below. Found in humid forest of Venezuela, Guyana, and northern Brazil. Non-parasitic; follows army ants. Insectivore and small vertebrate predator. Rarely encountered; Near Threatened.

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