Silver Gull Aerial Predation

To: "Jon Irvine" <>, "'birding-aus'" <>
Subject: Silver Gull Aerial Predation
From: "michael norris" <>
Date: Thu, 9 Dec 2010 23:21:40 +1100
Hi Jon

No - it's not good to see them catching live prey, especially at night.

German research has indicated, if not proved, that light pollution has serious effects on insect diversity and abundance. For instance, the "vacuum cleaner" impact sucks insects into the light and, for some species where one sex does not fly, this means the potential partners die in disproportionate numbers when they are killed by bats... and silver gulls....

And why are the gulls feeding on live prey? Because their vastly increased numbers, and now all-year round breeding, in urban areas as a result of trash means there are many more individuals short of day time food that need to hunt at night.

I guess we agree the trash is the issue to be tackled. Ian Temby's work on silver gulls in Melbourne includes accounts of roof top nests surrounded by chicken bones. And estimates the damage caused by their excretions etc in the millions.

Michael Norris

<Prev in Thread] Current Thread [Next in Thread>

The University of NSW School of Computer and Engineering takes no responsibility for the contents of this archive. It is purely a compilation of material sent by many people to the birding-aus mailing list. It has not been checked for accuracy nor its content verified in any way. If you wish to get material removed from the archive or have other queries about the archive e-mail Andrew Taylor at this address: andrewt@cse.unsw.EDU.AU