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Song & Call Comparison
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Song & Call Comparison
Goliath Coucal
Song
Loud, far-carrying coo with resonant quality; deep notes building in dramatic sequence from forest perch.
Dark Hawk-Cuckoo
Song
Loud, raucous call with harsh quality; penetrating notes carrying through dense forest in South Asia.
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Geographic Range & Migration
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Conservation Status Comparison
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Conservation Status
Least Concern
Goliath Coucal
Least Concern
Dark Hawk-Cuckoo
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Identification Tips — How to Tell Them Apart
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How to Tell Them Apart
Goliath Coucal
Plumage
Lesser Coucal: smaller; dark brown above; rufous wings; pale buff-white below; red eye; long graduated dark tail; less glossy
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 Each Bird (Descriptions)
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Goliath Coucal (Centropus goliath) — 65–75 cm. The largest coucal; all-dark with a massive decurved bill; faint bronze-green gloss; very long tail. Endemic to the Moluccas, Indonesia, in primary lowland forest. Non-parasitic. Omnivore; hunts large lizards, birds, frogs, and invertebrates.
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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Related Comparisons
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More Birds in Family
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