South Atlantic, lat. 38° 30’ S, long. 56° W, 100 miles [c. 160 km] off coast of Argentina.
Until recently was treated as conspecific with D. exulans, but differs in its smaller size with considerably shorter bill (from published data on males#R, effect size −5.12, score 3); no plumage characters, however, constantly and definitively separate it, although adults generally do not reach the whiteness shown by those of exulans, and there appears to be a higher number of stages before full adult plumage attained#R#R; see also comments concerning plumage difference with latitude under D. amsterdamensis. Level of genetic differentiation reported to be low#R or relatively high#R; one work argues that each form (less D. antipodensis gibsoni) in the exulans group represents “a distinct, evolutionarily important population for which a unique biological history exists”#R on basis of natal philopatry and at-sea distribution patterns. Thus, although present form fails criteria of the scoring system used herein and is treated as a subspecies by some authorities#R#R, it is treated as a species by ACAP (Agreement on the Conservation of Albatrosses and Petrels)#R and several others#R#R#R, and, pending further clarification, this view is provisionally and precautionarily accepted here. Monotypic.
South Atlantic Ocean, breeding on Gough I and occasionally Inaccessible I, formerly also on Tristan da Cunha#R.
Food and feeding
Status and conservation
Only subscribers are able to see the bibliography. Login or Subscribe to get access to a lot of extra features!