Thursday, January 23, 2020

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

TitleBreeding of variable oystercatchers (Haematopus unicolor) at Kaikoura Peninsula, South Island, New Zealand
Publication TypeJournal Article
Year of Publication2008
AuthorsRowe, L
JournalNotornis
Volume55
Issue3
Pagination146-154
Type of Articlearticle
Keywordsbreeding success, clutch size, egg size, Haematopus unicolor, Kaikoura Peninsula, variable oystercatcher
Abstract

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

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