The endemic Weka Gallirallus australis has been introduced to several islands where it preys on eggs and chicks - causing up to 38% of egg mortality and 20% of chick mortality on Open Bay Island1. Other predators include dogs (particularly during moulting when adults are confined to the shore for 20-30 days), cats, stoat Mustela erminea and rats1,2,3. Birds are disturbed by humans at nest-sites, killed on roads, and may be accidentally captured in set-nets. Marine perturbations can cause substantial changes in prey abundance, and a future rise in sea temperatures could have a similar effect. Squid fisheries potentially compete for food1. A marine farm is planned for the Jackson's Bay area where 10% of the population of this species is found7.
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