In 1978, the total population of these birds was estimated at 2,000 to 3,000 birds and, although population trends are unknown, numbers are thought likely to be stable (2). Whilst there appears to be no immediate danger to this relatively common bird, its restricted range means that it will always be vulnerable to catastrophic loss, most likely by the accidental introduction of carnivores to the small predator-free islands, which could decimate current populations (4) (2). The fear is that fishing boats or other passing vessels could introduce predators such as rats (Rattus spp.), cats and mustelids (Mustela spp.), or mice that may compete for food (2). Although such introductions were once thought unlikely due to the islands’ isolated location, increased fishing pressure in waters around the Antipodes has greatly increased the chance of such a potentially devastating possibility (5) (2).