Justification of Red List Category
This species was lost from both islands where it used to occur in the late 1800s or early 1900s and is now Extinct.
The population was lost from the both islands by the early 1900s.
The population is no more.
Acrocephalus musae (including garretti) went extinct on the islands of Raiatea and Huahine respectively, in the Society Islands, French Polynesia, in the late 1800s or early 1900s.
It was thought to breed exclusively in bamboo thickets (P. Raust in litt. 2007).
The introduction of feral cats Felis catus, rats Rattus spp. (A. Gouni in litt. 2012) and many alien bird species, including the aggressive Common Myna Acridotheres tristis, may have contributed to its extinction (Thibault 1988, Seitre and Seitre 1991).
Text account compilers
Mahood, S., O'Brien, M., Khwaja, N., Derhé, M., Westrip, J., Shutes, S., Stattersfield, A., Martin, R
Blainvillain, C., Gouni, A., Raust, P.
BirdLife International (2020) Species factsheet: Acrocephalus musae. Downloaded from http://www.birdlife.org on 10/07/2020. Recommended citation for factsheets for more than one species: BirdLife International (2020) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 10/07/2020.