- Clements, J. F., T. S. Schulenberg, M. J. Iliff, D. Roberson, T. A. Fredericks, B. L. Sullivan, and C. L. Wood. 2014. The eBird/Clements checklist of birds of the world: Version 6.9. Downloaded from http://www.birds.cornell.edu/clementschecklist/download/
Habitat and Ecology
IUCN Red List Assessment
Red List Category
Red List Criteria
- 2014Critically Endangered (CR)
Higashijima is an IBA. It is protected by the Forestry Agency and access to the island is restricted (Forestry and Forest Products Research Institute 2015).Rats have already been eradicated on Higashijima, following a program of poisoned bait application between 2008 and 2010 (Kawakami et al. 2012). Currently there is an on-going eradication programme, as detailed for each island in the Ogawasara Islands Ecosystem Conservation Action Plan (Anon. 2010). Work is ongoing to remove introduced plant species on Higashijima.A careful investigation of known seabird colonies in the subtropical/tropical western Pacific with small shearwaters may reveal additional records. Street lights that reduce light pollution have been installed in residential areas in the Bonin Islands to reduce disturbance to the species (Forestry and Forest Products Research Institute 2015). Passive acoustic sensors have been installed on Midway Atoll and the Bonin Islands to monitor for the species (Pyle et al. 2014).
Conservation Actions Proposed
Survey seabird colonies on Higashijima and Kitanoshima to confirm additional breeding sites for this species. Examine other known seabird colonies in the subtropical west Pacific (northern Marianas in particular) for evidence of this species. Nihoa and Necker Islands in the north-west Hawaiian islands and other Hawaiian islands that support Bulwer's Petrel should be searched as they may hold suitable habitat (Pyle et al. 2014).Ensure Higashijima is free of rats. Eradicate rats, goats and pigs from all small islands in the Bonin group. Study the ecology and distribution of the species; more information is needed on their at-sea biology (Pyle et al. 2014).
The Bryan's shearwater (Puffinus bryani) is a species of shearwater that may occur around the Hawaiian Islands. It is the smallest species of shearwater and is black and white with a bluish gray beak and blue tarsi. First collected in 1963 and thought to be a little shearwater (Puffinus assimilis) it was determined using DNA analysis to be distinct in 2011. It is rare and possibly threatened and there is little information on its breeding or non-breeding ranges. It is named after Edwin Horace Bryan Jr. a former curator of the B. P. Bishop Museum at Honolulu.
On February 7, 2012, the DNA tests on six specimens found in Ogasawara alive and dead between 1997 and 2011 determined that they were Bryan's shearwaters. It is assumed that Bryan's shearwaters still survive in the uninhabited islands.
- Peter Pyle, Andreanna J. Welch and Robert C Fleischer (2011) A new species of Shearwater (puffinus) recorded from Midway Atoll, Northwestern Hawaiian Islands. The Condor.
- 絶滅したと思われていたミズナギドリの希少種を小笠原諸島で再発見 (PDF) (in Japanese). Forestry and Forest Products Research Institute. Retrieved February 7, 2012.
- "PSG 2012 Hawaii Abstract" (PDF). Pacific Seabird Group. p. 37. Retrieved February 10, 2012.
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