Family: Acrocephalidae (Reed-warblers)

Authority: (Murphy & Mathews, 1929)

Red List Category

Criteria: B1ab(v)

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Justification of Red List category
This species is listed as Critically Endangered because it has an extremely small range on one island, it is considered to be undergoing a decline as a result of invasive species, and it is threatened by the invasion of Black Rats and Common Myna.

Population size: 600-1900 mature individuals

Population trend: decreasing

Extent of occurrence (breeding/resident): 7 km²

Country endemic: yes

Attributes
Land-mass type - oceanic island
Realm - Oceanian
IUCN System - Freshwater
IUCN System - Terrestrial