Tuesday, August 11, 2020

Hybridisation by South Island pied oystercatcher (Haematopus finschi) and variable oystercatcher (H. unicolor) in Canterbury

TitleHybridisation by South Island pied oystercatcher (Haematopus finschi) and variable oystercatcher (H. unicolor) in Canterbury
Publication TypeJournal Article
Year of Publication2010
AuthorsCrocker, T, Petch, S, Sagar, P
JournalNotornis
Volume57
Issue1
Pagination27-32
Type of ArticleFull article
Keywordsconservation management, Haematopus finschi, Haematopus unicolor, hybridisation, South Island pied oystercatcher, variable oystercatcher
Abstract

We document hybridisation between South I pied oystercatcher (Haematopus finschi) and variable oystercatcher (H. unicolor) in Canterbury from 1989 to 2005. From 2 observations of hybridisation between South I pied oystercatcher x variable oystercatcher when first discovered, the hybrid swarm has increased to around 17 pairs, including South I pied oystercatcher pairs, variable oystercatcher pairs, hybrid pairs, and mixed pairs. We present data on the birds and their offspring and speculate on possible causes and implications of hybridisation for conservation of the taxa.

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