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Side-by-Side Comparison

Attribute	Moluccan Cuckoo	Rufous-winged Ground-cuckoo
Scientific Name	Cacomantis aeruginosus	Neomorphus rufipennis
Order	Cuculiformes	Cuculiformes
Family	Cuculidae	Cuculidae
Conservation Status	Least Concern	Least Concern
Length	—	—
Wingspan	22.4 cm (8.8 in)	34.1 cm (13.4 in)
Weight	35.8 g (1.26 oz)	381.25 g (13.45 oz)
Diet	--	--
Clutch Size	--	--
Population Trend	—	—

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Habitat Comparison

Shared Habitats

🌲 Forest

Moluccan Cuckoo only

None

Rufous-winged Ground-cuckoo only

None

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Song & Call Comparison

Moluccan Cuckoo

Song

Loud, far-carrying call with raucous quality; harsh penetrating notes given from forest perch. 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

Moluccan Cuckoo

Least Concern

Rufous-winged Ground-cuckoo

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How to Tell Them Apart

Moluccan Cuckoo

Plumage

Moluccan Cuckoo: dark olive-brown above; pale buff below; long dark graduated tail; yellow eye-ring; Moluccan island endemic

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

Moluccan Cuckoo

Moluccan Cuckoo (Cacomantis aeruginosus) — 22–25 cm. Brown above with greenish gloss; pale buff-rufous below; yellow orbital ring. Endemic to the Moluccas, Indonesia. Inhabits forest and forest edge. Brood parasite. 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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