Millerbird
Acrocephalus familiaris
A small old-world warbler that occurs only on Nihoa and Laysan in the Northwestern Hawaiian Islands. Unlikely to be confused with any other species; the only other passerines on those islands are finches. Does not occur on the main Hawaiian Islands. Prefers dense, low vegetation. Usually secretive and hard to see well, but males sometimes sing from an exposed perch. Song and calls are harsh chirps and churring.
Taxonomy
It has two subspecies, A. f. kingi and A f. familiaris. The nominate subspecies, the Laysan millerbird, became extinct sometime between 1916 and 1923. The former, the critically endangered Nihoa millerbird, remains the only race left, inhabiting the small island Nihoa in Hawaiʻi, though it has since been reintroduced to Laysan. It is the only Old World warbler to have colonised Hawaiʻi, although there is no fossil evidence that the species ever had a distribution beyond these two islands.
- Scientific name
- Acrocephalus familiaris
- Authority
- (Rothschild, 1892)
- Order
- Passeriformes
- Family
- Acrocephalidae
- Genus
- Acrocephalus
Range and habitat
- Migration
- Resident species
Conservation
- Population trend
- unknown
Photos
Distribution
Bird Calls
Other Birds

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