DistributionRead full entry
Range DescriptionSterna acuticauda is known from southern China (previously regular in Yunnan, now very rare), Pakistan (fairly common in north Sind and Punjab), India (widespread and locally fairly common, but some evidence for localised declines), Nepal (once locally fairly common, declining since the early 1990s at least, and judged to be a rare and very local visitor in the lowlands, with a maximum population of 20 estimated in 2011 [C. Inskipp and H. S. Baral in litt. 2011]), Bangladesh (previously common, now a local breeder; the provenance of some recent records has been questioned [P. Thompson in litt. 2011]), Myanmar (previously abundant, now declining rapidly and a scarce to uncommon resident, with some surveys since 2002 failing to record the species at all [J. C. Eames in litt. 2012]), Thailand (formerly resident in the north-west, now very rare and probably extinct as breeding species), Laos (previously bred in large numbers along the Mekong channel, now very rarely recorded), Cambodia (in early 1960s the species was apparently fairly common along the Mekong; the last breeding record was of just two pairs in 2003 [C. Poole in litt. 2003], and it is now considered probably extinct there [Goes et al. 2010]) and Vietnam (formerly occurred regularly in Cochinchina, and occasionally in Annam, but now probably extinct). There has been a precipitous decline in South-East Asia and it is now almost extinct in the region. Despite its large range, the species may now number fewer, perhaps significantly fewer, than 10,000 mature individuals (Perennou et al. 1994, S. Mahood in litt. 2012).