Habitat and Ecology
IUCN Red List Assessment
Red List Category
Red List Criteria
Rats have already been eradicated on Higashijima Island, 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). Confirmation of a breeding population is still necessary, and a careful investigation of known seabird colonies in the subtropical/tropical western Pacific with small shearwaters may reveal additional records.
Conservation Actions Proposed
Survey seabird colonies on Higashijima and Kitanoshima to confirm breeding of this species. Examine other known seabird colonies in the subtropical west Pacific (northern Marianas in particular) for evidence of this species. Ensure Higashijima is free of rats. Eradicate rats, goats and pigs from all small islands in the Bonin group.
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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