Island Swiftlet (Aerodramus inquietus) [XC244496]
by Todd Mark from Japanese Gun, Weno, Moen, Chuuk, Micronesia (flight call)
Island Swiftlet (Aerodramus inquietus) [XC100258]
by id from Japanese Tunnel, near Wone, Pohnpei, Micronesia (call)
Subspecies
Aerodramus inquietus (Sibley and Monroe 1990, 1993) has been split into Mariana Swiftlet (Aerodramus bartschi) following Browning (1993) and AOU (1998) and Caroline Swiftlet (Aerodramus inquietus) following Browning (1993).
Genus often merged into Collocalia. Forms superspecies with Mossy-nest Swiftlet (Aerodramus salangana), Uniform Swiftlet (Aerodramus vanikorensis), Palau Swiftlet (Aerodramus pelewensis) and Mariana Swiftlet (Aerodramus bartschi) and all were formerly considered conspecific. Considered conspecific with Mariana Swiftlet (Aerodramus bartschi) by some authors.