Blue-backed Parrot (Tanygnathus sumatranus) [XC90090]
by Niels Poul Dreyer from Togian: hills near Wakai, Indonesia (flight call, flight calls at night)
Blue-backed Parrot (Tanygnathus sumatranus) [XC151813]
by Marc Anderson from Tangkoko Nature Reserve, Sulawesi, Indonesia (call)
Subspecies
Proposed subspecies mulleri is synonym of nominate, and indeed species formerly listed as Tanygnathus mulleri. Birds of Banggai have been awarded subspecies incognitus, based on supposedly different iris colour, but data come from unreliable labels. "Tanygnathus heterurus" (Rufous-tailed/Salvadori's Parrot) probably described from an aberrant specimen of present species.