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Side-by-Side Comparison

Attribute	Grey-capped Cuckoo	Rufous-winged Ground-cuckoo
Scientific Name	Coccyzus lansbergi	Neomorphus rufipennis
Order	Cuculiformes	Cuculiformes
Family	Cuculidae	Cuculidae
Conservation Status	Least Concern	Least Concern
Length	—	—
Wingspan	23.0 cm (9.1 in)	34.1 cm (13.4 in)
Weight	51.0 g (1.80 oz)	381.25 g (13.45 oz)
Diet	--	--
Clutch Size	2-5	--
Population Trend	—	—

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Habitat Comparison

Shared Habitats

🌲 Forest

Grey-capped Cuckoo only

None

Rufous-winged Ground-cuckoo only

None

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Song & Call Comparison

Grey-capped Cuckoo

Song

Loud, harsh call with nasal penetrating quality; rough notes carrying through dense forest in Asia. Vocalization pattern typical of this species in its native habitat.

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

Grey-capped Cuckoo

Least Concern

Rufous-winged Ground-cuckoo

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How to Tell Them Apart

Grey-capped Cuckoo

Plumage

Mangrove Cuckoo: olive-brown above; buff-orange below; long dark spotted tail; yellow bill; black mask; Caribbean-American species

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

Grey-capped Cuckoo

Grey-capped Cuckoo (Coccyzus lansbergi) — 25–29 cm. Pale grey cap contrasting with brown back; rufous-buff underparts; yellow-based bill; white tail spots. Inhabits dry scrub and forest edge from Colombia and Venezuela south to Peru and Bolivia. Non-parasitic. Insectivore.

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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