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Side-by-Side Comparison

Attribute	Yellow-billed Cuckoo	Dark Hawk-Cuckoo
Scientific Name	Coccyzus americanus	Hierococcyx bocki
Order	Cuculiformes	Cuculiformes
Family	Cuculidae	Cuculidae
Conservation Status	Least Concern	Least Concern
Length	—	—
Wingspan	28.7 cm (11.3 in)	35.9 cm (14.1 in)
Weight	56.73333333333333 g (2.00 oz)	137.0 g (4.83 oz)
Diet	--	--
Clutch Size	1-5	--
Population Trend	—	—

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Habitat Comparison

Shared Habitats

🌲 Forest

Yellow-billed Cuckoo only

None

Dark Hawk-Cuckoo only

None

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Song & Call Comparison

Yellow-billed Cuckoo

Song

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

Dark Hawk-Cuckoo

Song

Loud, raucous call with harsh quality; penetrating notes carrying through dense forest in South Asia.

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Conservation Status

Least Concern

Yellow-billed Cuckoo

Least Concern

Dark Hawk-Cuckoo

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How to Tell Them Apart

Yellow-billed Cuckoo

Plumage

Little Cuckoo: small; rich chestnut-rufous above; pale buff below; rufous tail; yellow bill; neotropical squirrel cuckoo group

Dark Hawk-Cuckoo

Plumage

Dark Hawk-Cuckoo: dark brown above; pale below with dense dark barring; hawk-like; long barred tail; yellow orbital ring; dark morph

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About These Birds

Yellow-billed Cuckoo

Yellow-billed Cuckoo (Coccyzus americanus) — 27–32 cm. Brown above; white below; yellow lower mandible; rufous wing patches in flight; white-spotted tail. Migratory breeder in North America; winters in South America. Non-parasitic. Insectivore specialising in caterpillars and cicadas. Western population listed as Threatened.

Dark Hawk-Cuckoo

Dark Hawk-Cuckoo (Hierococcyx bocki) — 28–31 cm. Dark grey above; pale below with darker streaking; barred tail. Restricted to montane forest of the Malay Peninsula. Brood parasite. Insectivore. Rare; poorly documented.

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More Birds to Explore

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