Whistling Yellowbill vs Sulawesi Cuckoo
Ceuthmochares australis compared with Cuculus crassirostris
Side-by-Side Comparison
| Attribute | Whistling Yellowbill | Sulawesi Cuckoo |
|---|---|---|
| Scientific Name | Ceuthmochares australis | Cuculus crassirostris |
| Order | Cuculiformes | Cuculiformes |
| Family | Cuculidae | Cuculidae |
| Conservation Status | Least Concern | Least Concern |
| Length | — | — |
| Wingspan | 24.4 cm (9.6 in) | 41.2 cm (16.2 in) |
| Weight | 64.2 g (2.26 oz) | 85.0 g (3.00 oz) |
| Diet | -- | -- |
| Clutch Size | 1-4 | -- |
| Population Trend | — | — |
Habitat Comparison
Song & Call Comparison
Whistling Yellowbill
Loud, harsh call with penetrating quality; rough resonant notes carrying through dense forest habitat.
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
Whistling Yellowbill
Sulawesi Cuckoo
How to Tell Them Apart
Whistling Yellowbill
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
Whistling Yellowbill
Whistling Yellowbill (Ceuthmochares australis) — 30–35 cm. Very similar to Chattering Yellowbill — grey plumage; yellow bill; long tail — but distinguished by its melodic whistled song rather than chattering calls. Found in forest and forest edge in East and Southeast Africa from Kenya to Mozambique. Non-parasitic. 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.