chestnut-bellied monarch Monarcha castaneiventris

A medium-sized glossy blue-black monarch with a chestnut belly and undertail and a pale grayish bill. Birds on small islands north and southeast of Makira are entirely glossy purple-black; birds on the Russell Islands are polymorphic. Found mostly in primary forest, rarely above 1100 meters of elevation. Almost identical to Bougainville Monarch, but lacks white (male) or chestnut (female) bill-base crescent of this species. Song is a series of rapid “kwee kwee kwee” whistles. Common calls are harsh, scolding chattering notes.