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Side-by-Side Comparison

Attribute	Green-billed Coucal	Rufous-winged Ground-cuckoo
Scientific Name	Centropus chlororhynchos	Neomorphus rufipennis
Order	Cuculiformes	Cuculiformes
Family	Cuculidae	Cuculidae
Conservation Status	Vulnerable	Least Concern
Length	—	—
Wingspan	33.0 cm (13.0 in)	34.1 cm (13.4 in)
Weight	244.4 g (8.62 oz)	381.25 g (13.45 oz)
Diet	--	--
Clutch Size	2-3	--
Population Trend	—	—

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Habitat Comparison

Shared Habitats

🌲 Forest

Green-billed Coucal only

None

Rufous-winged Ground-cuckoo only

None

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Song & Call Comparison

Green-billed Coucal

Song

Loud, nasal call with carrying quality; distinctive resonant notes given from tall African forest tree.

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

Vulnerable

Green-billed Coucal

Least Concern

Rufous-winged Ground-cuckoo

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How to Tell Them Apart

Green-billed Coucal

Plumage

Sunda Coucal: dark glossy brown above; rufous wings; pale buff-cream below; long graduated dark tail; red eye; forest-dwelling

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

Green-billed Coucal

Green-billed Coucal (Centropus chlororhynchos) — 43–47 cm. Blue-black with a long graduated tail; pale greenish bill. Endemic to Sri Lanka in wet forest and dense riverine scrub. Non-parasitic. Omnivore; hunts lizards, large insects, and frogs. Vulnerable; highly forest-dependent and threatened by ongoing deforestation.

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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More Birds to Explore

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