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    • Diagram of the predator plague cycle.
    Rights: Department of Conservation, Crown Copyright. CC BY 4.0. Published 4 June 2019 Size: 270 KB Referencing Hub media

    When it masts, the increased abundance of seed leads to much higher rodent and stoat numbers. These introduced pests prey on endangered birds.

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      Mast years

      What is a mast? You might be forgiven for thinking it had more to do with ships than conservation! The term comes from the ancient English word ‘mæst’, which was used to refer to years when ...

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