A six-member squadron of raptors are due to scatter Dubbo's starlings from Monday.
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The plan to use birds of prey to scare off the pests in the centre of the city had a slower than expected passage through regulatory hoops but this week it was poised to take off.
Dubbo City Council, which engaged a falconry contractor, recently confirmed the trial would go ahead but with a change.
The peregrine falcons and owls would see one week of action this autumn and then return to the city in January, council parks and landcare services director Murray Wood said.
Their mission is to intimidate the starlings that have cost the city thousands of dollars in cleaning alone in the past decade.
The council reports there is some science that suggests flocking birds generate multi-generational memory that keeps them coming back to a comfortable place like Macquarie Street.
In the past the council has tried water cannons, lasers and hallucinogenic drugs to disrupt the introduced species, at times gaining national and international media coverage but little success.
It gave no guarantees falconry would be any different but pressed ahead with the new weapon, estimated to cost $18,000.
The council liaised with a contractor that undertook falconry at the Melbourne Cricket Ground.
Mr Wood said the council had not been aware of the full extent of regulations governing the movement of the birds across state boundaries.
It was a matter out of the council's control, but the approvals had been obtained meaning the contractor could come back easily in January, he said.
The director said interest in the trial had spread far and wide.
A teacher from Dubbo West Public School had contacted him and was keen to use the birds as a learning experience, Mr Wood.
A report to last month's council meeting said the contractor would use peregrine falcons on dusk when the starlings come to roost and then use barking and masked owls after dusk to disrupt roosting sites.
Under the council resolution a trial of the installation of predator bird models and a program of thinning inner canopies of some trees in the main street would also take place.
It will also investigate a community starling trapping program.