The Fly River grassbird was formally described in 1879 by the Italian naturalists Luigi D'Albertis and Tommaso Salvadori from specimens collected near the Fly River in New Guinea. They coined the binomial namePoodytes albolimbatus.[2] The genus name combines the Ancient Greekpoa meaning "grass" with dutēs meaning "diver". The specific albolimbatus combines the Latinalbus meaning "white" with limbatus meaning "edged" (from limbus meaning "border", "fringe" or "band").[3] The species is monotypic: no subspecies are recognised.[4]