H. Saunders, 1876,
Apparently interbreeds with G. alba in Kiribati, and possibly E to Marquesas#R#R; recent study proposes conspecific treatment, on basis of genetics and morphometrics alone#R. Recognized as a species here on basis of previously published evidence#R, supported by other authors#R: smaller size, i.e. 23 vs 31 cm in length (based on a small sample of NHMUK measurements, effect size −5.03; ns); shallower tail notch (tail-length effect size −11.78; score 4); more black around eye (at least 1); whitish vs dark shafts of primaries (2); bill black, with no blue or only trace at base (subscore 1) and markedly narrower (subscore 2) (3). Monotypic.
Marquesas Is (Eiao to Fatu Hiva) and apparently also Phoenix Is and Line Is.
Food and feeding
Status and conservation
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