Anthornis is a bird genus in the honeyeater family (Meliphagidae). Its members are called bellbirds. According to genetic data, it is a sister genus to Prosthemadera.
It contains the following species:
- New Zealand bellbird, Anthornis melanura
- Chatham Islands bellbird, Anthornis melanocephala (extinct)
They are named bellbirds because their call sounds like a bell. Young male bellbirds copy the calls of neighbouring older males. Sometimes two males can sing in almost perfect unison because one has been copying the other.