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Range DescriptionBulweria fallax is a poorly known species of the north-west Indian Ocean, occurring widely offshore in the Arabian Sea and Gulfs of Aden and Oman, where it is often the commonest pelagic seabird (Porter et al. 1996), although there are no numerical estimates of total population size or trend. . It occurs commonly east of 58E in the Arabian Sea as far as the Maldive Ridge, regularly east to southern India and Sri Lanka, and incidentally further east (Van den Berg et al. 1991). During the summer monsoon (May-September) it congregates off the Socotra archipelago (Yemen), where a breeding colony of at least c.50 pairs was recently discovered (Taleb 2002) and where c.3,000 pairs are now estimated to nest locally on mainland cliffs (Al Saghier et al. unpublished), and also off the Halaaniyaat islands (southern Oman), where it may nest (or on the Arabian mainland adjacent) (Gallagher 1985). Similar sea-cliffs within its range on the coast of Somalia deserve investigation for breeding colonies (PERSGA/GEF 2003).