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Side-by-Side Comparison

Attribute	Rusty-breasted Cuckoo	Dark Hawk-Cuckoo
Scientific Name	Cacomantis sepulcralis	Hierococcyx bocki
Order	Cuculiformes	Cuculiformes
Family	Cuculidae	Cuculidae
Conservation Status	Not Evaluated	Least Concern
Length	—	—
Wingspan	—	35.9 cm (14.1 in)
Weight	31.95 g (1.13 oz)	137.0 g (4.83 oz)
Diet	--	--
Clutch Size	--	--
Population Trend	—	—

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Habitat Comparison

Shared Habitats

🌲 Forest

Rusty-breasted Cuckoo only

🏖️ Coastal

Dark Hawk-Cuckoo only

None

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Song & Call Comparison

Rusty-breasted Cuckoo

Song

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

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

Not Evaluated

Rusty-breasted Cuckoo

Least Concern

Dark Hawk-Cuckoo

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How to Tell Them Apart

Rusty-breasted Cuckoo

Plumage

Rusty-breasted Cuckoo: rusty-rufous breast; gray-brown above; pale belly; long dark tail; red eye-ring; bold rusty breast color

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

Rusty-breasted Cuckoo

Rusty-breasted Cuckoo (Cacomantis sepulcralis) — 22–25 cm. Grey above; rich rusty-buff underparts; yellow orbital ring. Inhabits forest, forest edge, and plantations from the Malay Peninsula and Greater Sundas to the Philippines and Sulawesi. Brood parasite. Insectivore.

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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