The Red-flanked Lorikeet (Charmosyna placentis) is a species of parrot in the Psittacidae family. It is found in Indonesia and Papua New Guinea. Its natural habitats are subtropical or tropical moist lowland forests and subtropical or tropical mangrove forests. Only the adult males have the red plumage on the head and sides.

Subspecies

There are five subspecies:

• Charmosyna placentis (Temminck) 1835

• Charmosyna placentis intensior (Kinnear) 1928
• Charmosyna placentis ornata Mayr 1940
• Charmosyna placentis pallidior (Rothschild & Hartert) 1905
• Charmosyna placentis placentis (Temminck) 1835
• Charmosyna placentis subplacens (Sclater,PL) 1876