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Range DescriptionHenicopernis infuscatus is a little-known endemic of New Britain (including Lolobau) in Papua New Guinea. There are only c.30 recent records, all of singles or pairs (Coates 1985, Clay 1994, K. D. Bishop in litt. 1994, B. Finch in litt. 1994, Hornbuckle 1999a, J. Pilgrim in litt. 1999). As a large raptor, it is believed to occur at low population densities and it appears to be much less common than the allospecific New Guinea Long-tailed Buzzard H. longicauda (B. Finch in litt. 1994, K. D. Bishop in litt. 1994, G. Dutson pers. obs. 1997-1998, P. Gregory in litt. 1999). However, it is an inconspicuous forest species which is probably widespread and is likely to be very under-recorded (G. Dutson pers. obs. 1997-1998, Dutson 2011).