The great-billed parrot (Tanygnathus megalorynchos) also known as Moluccan parrot or island parrot, is a medium-sized, approximately 38 cm long, green parrot with a massive red bill, cream iris, blackish shoulders, olive green back, pale blue rump and yellowish green underparts. The female is typically smaller than the male, but otherwise the sexes are similar.
The great-billed parrot is found in forest, woodland and mangrove in the south-east Asian islands of Maluku, Raja Ampat, Talaud, Sangir, Sarangani, the Lesser Sundas, and nearby small islands. The diet consists mainly of fruits.
Five subspecies are normally recognized.
- T. m. megalorhynchus (Boddaert 1783)
- T. m. affinis (Wallace 1863)
- T. m. sumbensis (A. B. Meyer 1882)
- T. m. hellmayri (Mayr 1944)
- T. m. subaffinis (P. L. Sclater 1883)