Friday, June 23, 2017

Temporal changes in birds and bird song detected in Zealandia sanctuary, Wellington, New Zealand, over 2011-2015

TitleTemporal changes in birds and bird song detected in Zealandia sanctuary, Wellington, New Zealand, over 2011-2015
Publication TypeJournal Article
Year of Publication2015
AuthorsBell, BD
JournalNotornis
Volume62
Issue4
Pagination173-183
Type of ArticleFull article
Keywordsbird song, conspicuousness, introductions, seasonality, transect-counts
Abstract

Bird counts were carried out in Zealandia sanctuary, Wellington, New Zealand, along a 6.3 km slow-walk transect, every 3 weeks for 4 years (2011-2015). The mean ± se number of species detected per count was 30.0 ± 0.4 (range 22-37) and the mean ± se total of individuals detected per count was 572.7 ± 12.8 birds (range 361-809). Of 43 species detected, 15 occurred on every count, 8 on most, 13 less frequently and 7 only occasionally. Forest birds were mostly first detected by sound, but water or wetland birds mostly by sight. For 35 species with sufficient data to model, significant seasonal changes occurred in 9 species (26%) and significant annual changes in 4 species (11%), with the total of birds counted peaking in late summer/autumn. Song output varied amongst passerines, with large seasonal effects in 6 European introduced species, but lower seasonal effects in 9 native species.

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