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Side-by-Side Comparison

Attribute	African Emerald Cuckoo	Eastern Koel
Scientific Name	Chrysococcyx cupreus	Eudynamys orientalis
Order	Cuculiformes	Cuculiformes
Family	Cuculidae	Cuculidae
Conservation Status	Least Concern	Least Concern
Length	—	—
Wingspan	21.1 cm (8.3 in)	42.0 cm (16.5 in)
Weight	38.0 g (1.34 oz)	239.33333333333334 g (8.44 oz)
Diet	--	--
Clutch Size	--	1
Population Trend	—	—

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Habitat Comparison

Shared Habitats

None

African Emerald Cuckoo only

None

Eastern Koel only

🌲 Forest

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Song & Call Comparison

African Emerald Cuckoo

Song

Deep, hollow resonant booming call; powerful low notes carrying far through dense tropical forest. Vocalization pattern typical of this species in its native habitat.

Eastern Koel

Song

Loud, far-carrying resonant call; deep musical notes audible through dense tropical forest in Sumatra.

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Conservation Status

Least Concern

African Emerald Cuckoo

Least Concern

Eastern Koel

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How to Tell Them Apart

African Emerald Cuckoo

Plumage

New Caledonian Bronze-cuckoo: bronze-green above; barred white below; island endemic; red eye; iridescent bronze-green; small size

Eastern Koel

Plumage

Rufous-throated Bronze-cuckoo: rufous throat contrasting bronze-green above; barred white below; small; distinctive rufous throat

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About These Birds

African Emerald Cuckoo

African Emerald Cuckoo (Chrysococcyx cupreus) — 20–22 cm. Male: dazzling emerald green above and on breast; yellow belly; red bill. Female: bronze-green above; rufous-barred below. Inhabits primary forest and dense secondary growth across West and Central Africa. Brood parasite targeting sunbirds and other small passerines. Insectivore.

Eastern Koel

Eastern Koel (Eudynamys orientalis) — 38–46 cm. Male glossy black; female brown with heavy spotting; pale green bill; red eye; long tail. Ranges across Southeast Asia, New Guinea, and Australia; migrates to Australia in spring. Brood parasite targeting magpies and friarbirds. Frugivore; disperses rainforest seeds.

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