Species Information

Acrocephalus kerearako

Species Authority

Holyoak, 1974

Common Name/s

Cook Islands Reed-warbler

Species Status

Near Threatened

Organism Type

Land bird


Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Passeriformes
Family: Sylviidae



Invasive Species Threat Summary

The Cook Islands Reed-warbler Acrocephalus kerearako is classified as ‘Near Threatened (NT)’ in the IUCN Red List of Threatened Species. It is endemic to the Cook Islands, where it occurs on two small islands, Mangaia and Miti’aro. Data on population trends and estimates are currently unavailable (BirdLife International, 2012).

It occurs on a range of habitat types, including woodland, gardens and reeds (BirdLife International, 2012). The primary threat to the A. kerearako appears to be the presence of as assortment of introduced species, especially on Mangaia Island. The species has to coexist with the aggressive, territorial and invasive Common Myna ( Acridotheres tristis). Potential predators such as cats ( Felis catus), Pacific rats ( Rattus exulans) and black rats ( Rattus rattus) are also present within the range of A. kerearako. Agricultural developments as well as extensive browsing by feral goats ( Capra hircus) can lead to severe habitat fragmentation and modification (BirdLife International, 2012).

Invasive Species Management Summary

The feasibility of eradicating A. tristis has been evaluated, at the value of $100,000 and is supported by local people. Future recommendations for conservation of this species include implementation of this eradication, surveys to determine population size so that future trends can be established, and setting up of protected areas of forest (BirdLife International 2011).


Implemented by
An Initiative of the ACP Group, funded by the European Union under the 10th EDF