Dyaul I, off north-western New Ireland (Bismarck Archipelago). Often treated as a full species, Monarcha ateralbus. Considered by some authors to be a subspecies of Black-tailed Monarch (Symposiachrus verticalis).
 
Subspecies
No subspecies.
Considered by some authors to be a subspecies of Black-tailed Monarch (Symposiachrus verticalis).