Blue-backed Parrot (Tanygnathus sumatranus) [XC331845]
by Frank Lambert from Kulisusu Utara, Kabupaten Buton Utara, Sulawesi Tenggara, Indonesia (flight call)
Blue-backed Parrot (Tanygnathus sumatranus) [XC820489]
by id from Pekuburan Kel.Mongan Moningka, Kota Tomohon, Sulawesi Utara, 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.