Choiseul Island, Solomons.
Genetically close to H. leucogaster, suggesting recent isolation, or ongoing or recent introgression, although they are not known to come into contact#R. Molecular analysis suggests that this form differs from H. leucogaster by as little as 0.3%#R, prompting the suggestion (following occasional earlier treatments) that the two are conspecific#R. However, adult sanfordi differs from adult leucogaster in its brown (not white) head, underparts and tail (3), brown (not grey) wings, this extending to the tail (3), decidedly smaller size (female sanfordi 2270–2725 g vs female leucogaster 2900–3400 g) (1), and different ratio of wing length to tail length (range for both sexes, in mm: sanfordi wing 519–575, tail 245–295, leucogaster wing 526–633, tail 208–298) (1). The two may even be considered parapatric (score 3), as they replace each other across a narrow sea gap (crossed by many terrestrial bird species) between Nissan I and Buka I#R. Present species is not a paedomorphic race of leucogaster, as adults lack the spotting found in juveniles of both taxa#R. Monotypic.
Solomon Is, including Bougainville I and Buka I.
Food and feeding
Status and conservation
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