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Breeding of variable oystercatchers (Haematopus unicolor) at Kaikoura Peninsula, South Island, New Zealand

  • Publication Type

    Journal

  • Publication Year

    2008

  • Author(s)

    L. Rowe

  • Journal Name

    Notornis

  • Volume, Issue

    55, 3

  • Pagination

    146-154

  • Article Type

    Paper

Keywords

breeding success; clutch size; egg size; Haematopus unicolor; Kaikoura Peninsula; variable oystercatcher


Breeding of variable oystercatchers (Haematopus unicolor) at Kaikoura Peninsula, South Island, New Zealand

Notornis, 55 (3), 146-154

L. Rowe (2008)

Article Type: Paper

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The nesting of variable oystercatchers (Haematopus unicolor) on the Kaikoura Peninsula was studied at 6 sites over 8 years. Only in 1 year were birds known to have laid eggs at all 6 sites and only at 2 sites was nesting observed every year. Loss of nests often resulted in re-nesting and at 1 site birds made 4 attempts in 1 season. Over the 8 years, 117 eggs were found in 53 nesting attempts between mid-Oct and late Jan. The average size of 114 eggs was 58.2 x 40.6 mm. Thirty of 53 nesting attempts were completed and averaged 2.4 eggs/clutch (range 1