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Home range, habitat use and movements by the little raven (Corvus mellori) in a coastal peri-urban landscape

Whisson, Desley A., Weston, Michael A. and Shannon, Kelly 2015, Home range, habitat use and movements by the little raven (Corvus mellori) in a coastal peri-urban landscape, Wildlife research, vol. 42, no. 6, pp. 500-508, doi: 10.1071/WR15039.

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Title Home range, habitat use and movements by the little raven (Corvus mellori) in a coastal peri-urban landscape
Author(s) Whisson, Desley A.ORCID iD for Whisson, Desley A. orcid.org/0000-0002-4221-0706
Weston, Michael A.ORCID iD for Weston, Michael A. orcid.org/0000-0002-8717-0410
Shannon, Kelly
Journal name Wildlife research
Volume number 42
Issue number 6
Start page 500
End page 508
Total pages 9
Publisher CSIRO
Place of publication Melbourne, Vic.
Publication date 2015
ISSN 1035-3712
Summary Context In peri-urban environments, high availability of anthropogenic resources may result in relatively high abundances of some species, with potentially negative implications for other native biota. Effective management of such impacts requires understanding of the spatial ecology of problem species. However, home range and habitat use have not been described for the little raven (Corvus mellori), a superabundant native predator that occurs in urban and natural habitats, including those where threatened shorebirds breed. Aims The aim of this study was to provide basic information on little raven home range, habitat use and movements in a coastal peri-urban landscape. Methods Between October 2011 and January 2012 we radio-tracked 20 little ravens captured in a coastal wetland (near Melbourne, Australia). Key results Little ravens were highly mobile, moving up to 9.9km in an hour (median≤2km), and had large ranges: Minimum Convex Polygons were 1664-9989ha (median≤3362ha). Although most birds used both anthropogenic and natural habitats, some birds strongly selected for coastal wetland habitat. Birds used multiple roosts during the study period, most of which occurred in grassland (58.7%) or urban (22.3%) areas. Movement of up to 8.3km (median≤2.2km) between roosts during the night was also detected. Conclusions Ravens were highly mobile and used large home ranges and a variety of habitats, with habitat preferences varying between birds. Implications Considering the large home ranges and inter-individual variation in habitat preferences of little raven populations, localised management to reduce their impacts on breeding shorebirds is unlikely to be successful. Journal compilation
Language eng
DOI 10.1071/WR15039
Field of Research 050202 Conservation and Biodiversity
Socio Economic Objective 960802 Coastal and Estuarine Flora, Fauna and Biodiversity
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2015, CSIRO
Persistent URL http://hdl.handle.net/10536/DRO/DU:30080314

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