In the central highlands and the Sepik valley there is a dark morph; males of this form are mostly blackish with a grey tail and the females are mostly dark brown.
Harrier | Marsh Harrier | Hawker Siddeley Harrier | Harrier Jump Jet | Montagu's Harrier | harrier (bird) | harrier | Swamp Harrier | Pallid Harrier | Hen Harrier | Papuan languages | Eastern Marsh Harrier | Space Harrier | Papuan Harrier | Hyde Harrier | Hen harrier | Harrier jump jet | Eyles' Harrier | East Papuan languages |
These are the Western Marsh Harrier (C. aeruginosus), Eastern Marsh Harrier (C. spilonotus), Papuan Harrier (C. spilonotus spilothorax or C. spilothorax), Swamp Harrier (C. approximans), Réunion Harrier (C. maillardi maillardi or C. maillardi) and Madagascar Marsh Harrier (C. maillardi macrosceles or C. macrosceles).