birding-aus

Sound of predators can be just as deadly as their claws and fangs

To: Peter Shute <>
Subject: Sound of predators can be just as deadly as their claws and fangs
From: Dave Torr <>
Date: Fri, 9 Dec 2011 13:00:50 +1100
Cats tend to be pretty silent predators in general so I doubt the birds
would hear them very often?

On 9 December 2011 12:50, Peter Shute <> wrote:

> "She and her colleagues hung speakers near song-sparrow nests and began
> broadcasting the sound of hawks, raccoons and other predators.
>
> "The sparrows were so scared they experienced something akin to
> post-traumatic stress. They laid fewer eggs and were so flustered many of
> their chicks starved to death.
>
> "By the end of the four-month experiment the sparrows had produced 40 per
> cent fewer young than normal, demonstrating what scientists say is the very
> real impact of fear."
>
> Given how unsuccessful this kind of thing is at keeping birds away from
> crops, I wonder if the effect would eventually wear off if they continued
> the experiment.
>
> "Clinchy says cats should not be allowed in wildlife areas as previous
> studies have shown that feral and domestic cats directly kill 22 per cent
> of birds in Victoria parks. He says the fear effect is likely reducing the
> number by another 20 per cent."
>
> Does this mean that even if it turns out to be true that someone's moggy
> doesn't actually kill anything, they're still have a big impact on local
> wildlife?
>
> Peter Shute
>
> > -----Original Message-----
> > From: 
> >  On Behalf Of
> > Ian & Carla Jackett
> > Sent: Friday, 9 December 2011 10:53 AM
> > To: 
> > Subject: [Birding-Aus] Sound of predators can be just as
> > deadly as their claws and fangs
> >
> > An interesting article on a recent study near Victoria B.C.
> >
> > Carla Jackett
> > Bellawongarah
> >
> > http://www.vancouversun.com/health/Sound+predators+just+deadly
> > +their+claws+f
> > angs/5831165/story.html
> >
> >
> >
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