Data Zone
Country/territory: Japan
IBA criteria met: A1, A4ii (2016)
For more information about IBA criteria, please click here
Area: 15,862 ha
Site description (2012 baseline)
This Marine IBA is identified using seaward extensions around breeding colonies. It originates from the Japan Exclusive Economic Zone (EEZ) and falls within the Pacific, Northwest FAO ocean region. The site covers an area of 159 km2 and is 22 km away from the closet coastline. The depth ranges from 0 to 96 m, mean annual sea surface temperature falls between 21.38 and 22.13 °C and mean annual chlorophyll-a concentrations found to range between 0.48 and 0.63 mg/m3.
Key biodiversity
1 species triggers IBA criteria at this Marine IBA. Seaward extensions around breeding colony; Birojima islet include key near-colony areas for breeding populations of Japanese Murrelet (VU).
Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Birojima islet - Marine (Japan). Downloaded from
https://datazone.birdlife.org/site/factsheet/birojima-islet--marine-iba-japan on 22/11/2024.