They don't generally eat cat, but they are easily bigger than she is and have big pointy beaks. So out we go to chase them away over the fence.
Aside from chasing the cat, they also tend to scratch up huge piles of dead vegetation in which to lay their eggs. They then add or remove leaves to keep the centre of the pile at the correct temperature for the eggs. While this is admirable, I don't particularly fancy having a 2 metre pile of rotting vegetation in our garden.
These little feathered beauties don't scare the cat but they are really loud right outside our bedroom window. They also take particular pride in their contribution to the dawn chorus.
So, Nature, as a compromise, perhaps the lorikeets can stay but the scrub turkeys must find somewhere else.