Grey-bellied Cuckoo vs Sulawesi Cuckoo
Cacomantis passerinus compared with Cuculus crassirostris
Side-by-Side Comparison
| Attribute | Grey-bellied Cuckoo | Sulawesi Cuckoo |
|---|---|---|
| Scientific Name | Cacomantis passerinus | Cuculus crassirostris |
| Order | Cuculiformes | Cuculiformes |
| Family | Cuculidae | Cuculidae |
| Conservation Status | Least Concern | Least Concern |
| Length | — | — |
| Wingspan | 22.6 cm (8.9 in) | 41.2 cm (16.2 in) |
| Weight | 24.884999999999998 g (0.88 oz) | 85.0 g (3.00 oz) |
| Diet | -- | -- |
| Clutch Size | -- | -- |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Grey-bellied Cuckoo
Loud, melodic call with musical resonant quality; rich notes building in sequence from forest canopy.
Sulawesi Cuckoo
Loud, raucous call with harsh quality; penetrating notes carrying through dense forest in Asia. Vocalization pattern typical of this species in its native habitat.
Conservation Status
Grey-bellied Cuckoo
Sulawesi Cuckoo
How to Tell Them Apart
Grey-bellied Cuckoo
Grey-bellied Cuckoo: gray above; pale gray-white below; long dark tail; yellow eye-ring; female has rufous morph; southern Asia
Sulawesi Cuckoo
Sulawesi Cuckoo: dark gray-brown above; pale below; long dark tail; yellow orbital ring; Sulawesi endemic; larger than most Cuculus
About These Birds
Grey-bellied Cuckoo
Grey-bellied Cuckoo (Cacomantis passerinus) — 21–24 cm. Grey above; pale grey below; yellow orbital ring. Inhabits open woodland, forest edge, and scrub across South Asia and Southeast Asia. Brood parasite targeting tailorbirds, babblers, and other passerines. Insectivore.
Sulawesi Cuckoo
Sulawesi Cuckoo (Cuculus crassirostris) — 30–34 cm. Dark grey above; pale below with bold brown-grey barring; heavier bill than most Cuculus. Endemic to Sulawesi in montane forest. Brood parasite. Insectivore. Poorly known.