Large-billed Reed-warbler Acrocephalus orinus

Family: Acrocephalidae (Reed-warblers)

Authority: Oberholser, 1905

Red List Category

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Justification of Red List category
This species has a moderately large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). The population trend is unknown, and hence the species cannot be listed as Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size is suspected to be moderately small, but it is not believed to approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern.

Population size: 1500-4999

Population trend: Unknown

Extent of occurrence (breeding/resident): 46,100 km2

Country endemic: No

Realm - Indomalayan
IUCN Ecosystem -- Freshwater biome
AEMLAP  2014

Recommended citation
BirdLife International (2023) Species factsheet: Acrocephalus orinus. Downloaded from on 31/03/2023. Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from on 31/03/2023.