 Western Australia banned the import of common starlings in 1895 . New flocks arriving from the east are routinely shot , while the less cautious juveniles are trapped and netted . New methods are being developed , such as <unk> one bird and tracking it back to establish where other members of the flock roost . Another technique is to <unk> the DNA of Australian common starling populations to track where the migration from eastern to western Australia is occurring so that better <unk> strategies can be used . By 2009 , only 300 common starlings were left in Western Australia , and the state committed a further A $ 400 @,@ 000 in that year to continue the eradication programme . 
