{# ════════════════════════════════════════════════════════════════════════
Song & Call Comparison
════════════════════════════════════════════════════════════════════════ #}
Song & Call Comparison
Sumatran Ground-cuckoo
เสียงร้อง
Deep, resonant whistled call; melodic notes with carrying quality audible through dense woodland habitat.
Dark Hawk-Cuckoo
เสียงร้อง
Loud, raucous call with harsh quality; penetrating notes carrying through dense forest in South Asia.
{# ════════════════════════════════════════════════════════════════════════
Geographic Range & Migration
════════════════════════════════════════════════════════════════════════ #}
{# ════════════════════════════════════════════════════════════════════════
Conservation Status Comparison
════════════════════════════════════════════════════════════════════════ #}
สถานะการอนุรักษ์
Critically Endangered
Sumatran Ground-cuckoo
Least Concern
Dark Hawk-Cuckoo
{# ════════════════════════════════════════════════════════════════════════
Identification Tips — How to Tell Them Apart
════════════════════════════════════════════════════════════════════════ #}
How to Tell Them Apart
Sumatran Ground-cuckoo
ขนนก
Goliath Coucal (large form): very large; dark brown; rich rufous wings; pale buff below; long dark tail; red eye; impressive
Dark Hawk-Cuckoo
ขนนก
Dark Hawk-Cuckoo: dark brown above; pale below with dense dark barring; hawk-like; long barred tail; yellow orbital ring; dark morph
{# ════════════════════════════════════════════════════════════════════════
About Each Bird (Descriptions)
════════════════════════════════════════════════════════════════════════ #}
Sumatran Ground-cuckoo (Carpococcyx viridis) — 52–58 cm. Bronzy-green above; pale buff below; bare red-and-yellow facial skin; long decurved bill; heavy build. Critically Endangered; restricted to lowland forest of Sumatra. Non-parasitic; terrestrial. Omnivore. Known from very few records; one of the rarest cuckoos in the world.
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.
{# ════════════════════════════════════════════════════════════════════════
Related Comparisons
════════════════════════════════════════════════════════════════════════ #}
{# ════════════════════════════════════════════════════════════════════════
More Birds in Family
════════════════════════════════════════════════════════════════════════ #}