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Retaruke and Manganui o te Ao River whio security site - Operational plan 2009 - 2014 (PDF, 914K)
Summary
The catchments of the Retaruke and Manganui o te Ao Rivers combine to form one of four North Island security sites designated under the national Whio Recovery Plan 2007 - 2017 as a priority for whio management. These catchments and associated side streams support a large population of whio Hymenolaimus malacorhynchos (blue duck).