Nosiu Miner Problem

I know lots people have problem with these birds and it’s our fault as humans because we create garden habitat they like. There are seriosuly about 50 of the bastards at my place. They chase off every other bird except the butcher birds. All the little honeyeaters and wrens have gone. I have planted heaps and heaps pf dense, prickly shrubs to give habitat and the smller birds started creeping back but then the miners went fukushima on them and again they’ve gone. I’ve got a big 1400sqm block. Anyone had any luck with deterrent methods. I wondered of those salt fly shooters would reach far enough. I’m prepared to spend hours going rambo on them if need be.