Ivory-backed Woodswallow (Artamus monachus) [XC822909]
by Teus Luijendijk from Sulawesi: Tangkoko lowlands, Indonesia (song)
Ivory-backed Woodswallow (Artamus monachus) [XC18873]
by David Farrow from Lore Lindu National Park, Sulawesi, Indonesia (call)
Subspecies
No subspecies.
Forms a superspecies with Great Woodswallow (Artamus maximus) and White-backed Woodswallow (Artamus insignis). Birds from Sula Is described as a geographical subspecies, sulaensis, are regarded as insufficiently differentiated from those in rest of species' range