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  1. 1
    by Powlesland, Ralph
    Published 1980
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    A time-budget study of the South Island robin Petroica australis australis at Kowhai Bush, Kaikoura
  2. 2
    by Powlesland, Ralph
    Published 1997
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    New Zealand's native birds of shore and wetland /
  3. 3
    by Powlesland, Ralph
    Published 1998
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    New Zealand's migrant waders /
  4. 4
    by Powlesland, Ralph
    Published 1998
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    Evaluating the impacts of 1080 possum control operations on North Island robins, North Island tomtits and moreporks at Pureora : preliminary results /
  5. 5
    by Powlesland, Ralph
    Published 1998
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    New Zealand's native seabirds /
  6. 6
    by Powlesland, Ralph
    Published 1998
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    The status of birds, peka and rodents on Niue : status report 1994-1995 /
  7. 7
    by Powlesland, Ralph
    Published 2009
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    Impacts of wind farms on birds : a review /
  8. 8
    by Powlesland, Ralph
    Published 2009
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    Impacts of wind farms on birds a review /
  9. 9
    by Powlesland, Ralph
    Published 1997
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    New Zealand's introduced birds of town and country /
  10. 10
    Other Authors “...Powlesland, Ralph...”
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    Kakapo /
  11. 11
    Published 1994
    Other Authors “...Powlesland, Ralph...”
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    Some aspects of the ecology and breeding biology of parea on southern Chatham Island, July 1992 - April 1993 /
  12. 12
    Published 1992
    Other Authors “...Powlesland, Ralph...”
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    Ecology and breeding biology of parea (Chatham Island pigeon) on Southern Chatham Island, July 1991-April 1992 /
  13. 13
    Published 1989
    Other Authors “...Powlesland, Ralph...”
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    Kakapo : recovery plan, 1989 - 1994 /
  14. 14
    Published 1995
    Other Authors “...Powlesland, Ralph...”
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    Some aspects of the ecology and breeding biology of parea on southern Chatham Island, July 1993 - April 1994 /
  15. 15
    by Hay, J. Rod
    Published 1998
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    Guide to the birds of Niue /
  16. 16
    by Mander, Christine J.
    Published 1998
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    Monitoring and management of kereru (Hemiphaga novaeseelandiae) /
  17. 17
    by Hay, J. Rod
    Published 1985
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    Kokako /

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