The Long-billed Myzomela is a honeyeater known from the high mountains of Goodenough Island. Females have a striking reddish back, and the species has a long bill. It is described as principally nectarivorous, while reports from Fergusson remain unconfirmed.
Females have a striking reddish back, a plumage feature highlighted in the taxonomic update. Its bill is notably long.
A field report describes it as a small canopy-dwelling bird and, citing a species reference, as principally nectarivorous. The authors did not detect it in their 2025 search on Fergusson Island.
An extinction-risk assessment has not been added yet.