The Black-headed Whistlers (Pachycephala monacha) – also known as Black-backed Whistlers – occur naturally in Indonesia and Papua New Guinea, where they inhabit subtropical or tropical moist lowland forests.
Subspecies and Ranges
- Pachycephala monacha monacha (G. R. Gray, 1858) – Nominate Race
- Range: Aru Islands located in the Maluku province of eastern Indonesia (off southwestern New Guinea).
- Pachycephala monacha lugubris (Salvadori, 1878)
- Range: Patchy distribution in the mountans of New Guinea– from Charles Louis mountains, the mouth of the Mimika and Utanata rivers, Snow and Victor Emanuel Ranges, and northern base of Bewani Mountains; along the Puwani River and Saruwaged Mountains east to the Owen Stanley Mountain range.
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