Birds

Sulawesi Cuckoo

Sulawesi Cuckoo

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The Sulawesi Cuckoo (Cuculus crassirostris) is an enigmatic and poorly known cuckoo species endemic to the island of Sulawesi in Indonesia. It is characterized by its relatively stout bill and is believed to be a brood parasite.
Where to spot
Endemic to the island of Sulawesi, Indonesia, found primarily in montane forests, typically at higher elevations (above 1000m).
How to spot
Look for a medium-sized cuckoo with a grey head and back, paler underparts, and a noticeably robust bill. Its call, typically a series of 'ko-ko' notes, is a crucial identifier, though it is not widely documented. Requires dedicated searching in appropriate habitats.
When to spot
Can be observed year-round within its restricted range, but observation opportunities are generally limited due to its shy and elusive nature and the challenging terrain it inhabits.
Its natural history, including breeding behavior and specific host species, is still largely a mystery to ornithologists, making it one of the less studied and more elusive cuckoos globally.
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