The Kai Coucal is endemic to the Kai Islands. A field account records it mainly singly or in pairs, in tall alang-alang grass, village gardens, coconut plantations, and mangrove edges.
The adult Kai form is described as black from head to underparts, with a greenish gloss over the black upperparts and faint barring on the primaries.
The field account records birds in tall alang-alang grass, village gardens, coconut plantations, and mangrove edges, usually singly or in pairs. On 25 April 1994, an individual near Taman Anggrek was seen carrying long, dry grass stems.
An extinction-risk assessment has not been added yet.