Actenoides princeps

is in a near-threatened state

Actenoides princeps
Old latin name - Monachalcyon princeps, Halcyon princeps.
Vocalizations include a rising and falling mournful whistle, “weeeeyu,” and an agitated chatter.

large forest kingfisher with a deep purple-blue head, a brown back, a pale collar, and whitish underparts. Bold scaling on upperparts and underparts is diagnostic.
North Sulawesi form has a buff collar, but collar is orange elsewhere on Sulawesi.
Males show a small buff mark at the base of the bill, while females show a buff eyebrow and mustache.
Found in dense understory of forests in the hills and mountains.