The articles says: ``I'm almost certain this porky kookaburra found a
resident or two who've been treating her with sausages''
I mean its interesting, and something to think about. But being `almost'
sure of the cause of obesity, in only *one* case , doesn't refute the
studies conducted around the world that show that dependency on supplement
feeding is around 10% in QLD, Australia, to up to 25% in colder countries.
On Thu, Jun 3, 2010 at 8:45 AM, Peter Shute <> wrote:
> The BOCA policy mentions that "There is very little empirical evidence for
> birds developing dependency on
> supplementary feed", and I've heard that before (possibly from the same
> source). But it doesn't appear to be the case for this bird:
>
> http://www.heraldsun.com.au/lifestyle/the-other-side/sausage-addicted-kookaburra-too-fat-to-fly/story-e6frfhk6-1225872729208
>
> You probably only need to read the URL to get the gist of the story.
>
> Peter Shute
>
> > -----Original Message-----
> > From:
> > On Behalf Of Dave Torr
> > Sent: Tuesday, 1 June 2010 8:56 AM
> > To: Belinda Cassidy
> > Cc:
> > Subject: Re: Subject: [Birding-Aus] Impact of bird-feeding on
> > clutch size
> >
> > BOCA has recently been researching the effects of
> > supplementary feeding and our policy on it is now available
> > as
> > http://boca.org.au/dmdocuments/brochures_2010_05_policy_on_bir
> > d_feeding.pdf
> >
> > On 31 May 2010 17:38, Belinda Cassidy
> > <> wrote:
> >
> > > Laurie,
> > >
> > > Thanks for the article; I provide supplement bird feed for several
> > > species myself, so I always appreciate reading new research .
> > >
> > > Its interesting to wonder why these birds are called
> > `Great Tits'. I
> > > can't believe I have to use that term, lol.. I wonder if
> > Google will
> > > net-nanny me for referring them by name? Is that why you
> > sent a link
> > > rather than embebding the article? I am going to refer to them as
> > > `birds' because its kind of weird to call them by the correct name.
> > >
> > > Anyway, its also interesting to wonder why the birds with
> > supplement
> > > food had worse hatching success than the ones who weren't .
> > >
> > > One thing that springs to mind is Beef tallow and peanut cake don't
> > > have a lot of calcium in them (for egg shell development). They are
> > > insectivores, which usually get a lot of calcium from the
> > exoskeletons
> > > of bugs, so I am not sure that the food provided was right
> > for them.
> > > It also sounds a bit fat rich too.
> > >
> > > Normally birds are canny enough to sort these kinds of
> > things out, but
> > > perhaps the supplement feed attracted too many birds to the
> > area, and
> > > the supplement feed became more important than it would
> > have been otherwise?
> > >
> > > I've only seen this happen in Australia with crows, who have a
> > > tendency to invade any area with supplement food, to the
> > detriment of breeding pairs.
> > >
> > > I'd be interested in hearing other thoughts?
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