Rusty-breasted Cuckoo vs Western Koel

Cacomantis sepulcralis compared with Eudynamys scolopaceus

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Side-by-Side Comparison

Attribute Rusty-breasted Cuckoo Western Koel
Scientific Name Cacomantis sepulcralis Eudynamys scolopaceus
Order Cuculiformes Cuculiformes
Family Cuculidae Cuculidae
Conservation Status Not Evaluated Least Concern
Length
Wingspan 39.3 cm (15.5 in)
Weight 31.95 g (1.13 oz) 230.0 g (8.11 oz)
Diet -- --
Clutch Size -- 2-3
Population Trend
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Habitat Comparison

Shared Habitats

Rusty-breasted Cuckoo only

Western Koel 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.

Western Koel

Song

Loud, far-carrying nasal call; distinctive penetrating notes audible through dense tropical forest. Vocalization pattern typical of this species in its native habitat.

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Conservation Status

Not Evaluated

Rusty-breasted Cuckoo

Least Concern

Western Koel

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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

Western Koel

Plumage

Shining Bronze-cuckoo: brilliant iridescent golden-green above; white barred below; bronze-green head; reddish eye; small size

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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.

Western Koel

Western Koel (Eudynamys scolopaceus) — 39–46 cm. Male glossy black; female brown with white spots and barred underparts; red eye. Widespread from South Asia through mainland Southeast Asia. Brood parasite targeting crows and mynas. Frugivore and insectivore. Its rising wailing call heralds the Indian summer.

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