The knob-billed fruit dove (Ptilinopus insolitus) is a species of bird in the family Columbidae.

The knob-billed fruit dove was originally described as Ptilopus insolitus by Hermann Schlegel in 1863 on the basis of specimens from New Ireland.

The generic name Ptilinopus is derived from the Ancient Greek words πτιλον (ptilon), meaning feather, and πους (pous), meaning foot.

[4] Knob-billed fruit dove is the official common name designated by the International Ornithologists' Union.

[5] Other common names for the species include red-knobbed fruit dove and Schlegel's fruit-dove.