Sadly, the grey petrel is a frequent victim of long-line fishing (7). In New Zealand waters, this petrel is the most frequently killed species by tuna-longline fisheries, with around 45,000 birds thought to be caught in the last 20 years (3). Substantial incidental mortality has also been recorded in fisheries off Australia, and it may be caught in significant numbers in international waters in the southern Indian Ocean, for which little seabird bycatch information exists (3). This species is particularly vulnerable to such dangers because of its attraction to food scraps around fishing boats (7). An additional serious threat comes from introduced predators on the breeding islands, such as cats and black rats (Rattus rattus) on Crozet and Kerguelen, brown rats (Rattus norvegicus) on the Campbell Islands and, until their fairly recent eradication, cats on Marion Island (3). Prioir to its successful recolonisation, the bird’s extinction on Macquarie Island was probably the result of predation by cats, weka (Gallirallus australis) and brown rats (R. norvegicus). Cats are also responsible for its near extinction on Amsterdam Island (3). Recently there has been serious concern that introduced house mice (Mus musculus) on Gough Island may be preying upon the eggs and chicks of this species. The mice have already had a significant impact on the breeding success of other threatened birds on the island (3). Population trends have not been quantified, but this species has clearly suffered a historic reduction in numbers and could be continuing suffer severe declines as the result of these combined threats (3).