I don't know much about cats but I remember a study on the effects of the
removal of Carrion Crows from a Common Eider colony at Forvie NNR in
Aberdeenshire Scotland. Removal by trapping and humanely killing the crows
(a serious predator of eider eggs) lead to an increase in nest / egg
predation as many immature non territorial birds moved in and all predated
eggs. By keeping the territorial pair but preventing successful breeding by
pricking the eggs, meant the pair drove off any other birds encroaching on
their territory but as they never had chicks to raise egg predation rates
stayed very low throughout the nesting season. Counter intuitive but
sometimes total removal of predators is not the best solution.
Dom
On 7 Apr 2015 4:50 pm, "Carl Clifford" <> wrote:
> An interesting article.
> http://www.abc.net.au/science/articles/2015/04/07/4203004.htm
>
> Carl Clifford
>
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