Mobbing of Sulphur-crested Cockatoos

To: <>
Subject: Mobbing of Sulphur-crested Cockatoos
From: "Daniel Gilmore" <>
Date: Thu, 30 Sep 2004 09:30:31 +1000
Hi everyone,

On my way to work today I witnessed two Sulphur-crested Cockatoos being 
persistently mobbed by a group of four Silver Gulls.  The gulls eventually 
drove the birds from their perch in a large Norfolk Island Pine.   I was 
wondering if anyone could suggest why gulls would show aggression to cockatoos? 
 Are they perceived to be a bird of prey by the gulls?  Any thoughts or 
experiences would be gratefully received.


Daniel Gilmore
Executive Research Assistant
mobile: 0428 108 379

Biosis Research Pty. Ltd.
Natural and Cultural Heritage Consultants
38 Bertie Street (PO Box 489)
Port Melbourne, Vic  3207
ph: (03) 9646 9499
fax: (03) 9646 9242

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