Home-range, diet and breeding of a Powerful Owl Ninox strenua in East Gippsland, Victoria

Bilney, Rohan J. 2013, Home-range, diet and breeding of a Powerful Owl Ninox strenua in East Gippsland, Victoria, Australian field ornithology, vol. 30, no. 1, pp. 40-46.

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Title Home-range, diet and breeding of a Powerful Owl Ninox strenua in East Gippsland, Victoria
Author(s) Bilney, Rohan J.
Journal name Australian field ornithology
Volume number 30
Issue number 1
Start page 40
End page 46
Total pages 7
Publisher BirdLife Australia
Place of publication Melbourne, Vic.
Publication date 2013
ISSN 1448-0107
Summary Between 2004 and 2008 the diet and breeding success of a pair of Powerful Owls Ninox strenua were studied near Lakes Entrance, Victoria. In early November 2006 the adult female Powerful Owl was captured and radio-tracked for a period of 7.5 months. During this time the Owl's location was recorded on 111 occasions, including 65 nocturnal locations over 29 nights. Her home-range was calculated as 1589 ha using the Minimum Convex Polygon (MCP) method, or 871 ha based on the 95% Adaptive Kernel method. The area of forested habitat within the MCP home-range was 896 ha (the remainder representing cleared land). Her activity was centred primarily on the nesting gully where two dependent juveniles roosted, but several long-distance foraging expeditions (including roosting) that occurred more than 2.5 km from the juveniles were recorded. Arboreal mammals and birds dominated the Owls' diet. Low prey availability is suggested as being responsible for the single successful breeding event recorded in four nesting seasons.
Language eng
Field of Research 050211 Wildlife and Habitat Management
Socio Economic Objective 960806 Forest and Woodlands Flora, Fauna and Biodiversity
HERDC Research category C1 Refereed article in a scholarly journal
Persistent URL http://hdl.handle.net/10536/DRO/DU:30055425

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