Until recently considered conspecific with T. cauta, T. steadi and T. eremita, but compared with eremita, to which it is very close genetically#R, has dull dusky olive-brown bill with yellowish culmen (3); pale grey hood (2); underwing typically with narrow white gap along leading edge of wing base (1) and some white in base of primaries (ns); shorter tail and longer tarsus (allow 2); (compared with cauta and steadi) has dull duskier bill with dark mark at tip of lower mandible and duller yellowish culmen (3); pale grey hood (2); much less white in base of primaries (2); slightly smaller size#R (allow 1). Monotypic.
S Indian and S Pacific Oceans, breeding on Crozet, Snares and Bounty Is. Breeding attempts in Kerguelen in recent years#R.
Food and feeding
Status and conservation
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