Tuesday, October 24, 2017

Banded rail (Gallirallus philippensis) occupancy and detection in saltmarsh mangrove systems at Onerahi, Whangarei Harbour

TitleBanded rail (Gallirallus philippensis) occupancy and detection in saltmarsh mangrove systems at Onerahi, Whangarei Harbour
Publication TypeJournal Article
Year of Publication2015
AuthorsBeauchamp, AJ
JournalNotornis
Volume62
Issue1
Pagination14-20
Type of ArticleFull Article
Abstract

Banded rails (Gallirallus philippensis) were surveyed in saltmarshes and mangrove fringed habitats at Onerahi, Whangarei, New Zealand. A total of 13 sites were surveyed 3 times per year around sunset during late spring in 2004, 2007 and 2013. On average 4.41 calls were heard per hour. Banded rails were detected at 12 sites with between 0.01 and over 2 ha of saltmarsh and extensive mangroves, but not a saltmarsh site lacking mangroves. Occupancy models favoured those with no change in occupancy state, seasonal detection, and there was with some support for random colonisation of sites. Records from Awaroa Creek indicate that rails can be detected from late afternoon calls throughout the year. Surveys should include the half hour before until at least 10 minutes after sunset.

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