 <unk> of noisy miners is unlikely to be a solution to their overabundance in remnant habitats . In a Victorian study where birds were banded and relocated , colonies moved into the now unpopulated area but soon returned to their original territories . The <unk> birds did not settle in a new territory . They were not assimilated into resident populations of miners , but instead wandered up to 4 @.@ 2 kilometres ( 2 @.@ 6 mi ) from the release point , moving through apparently suitable habitat occupied by other miners — at least for the first 50 days following translocation . Two birds with radio tracking devices travelled 18 kilometres ( 11 mi ) back to their site of capture . Although noisy miners are protected across Australia , and a permit is required to <unk> them , culling has been proposed as the most humane and practical method of reducing their impact , particularly where combined with rehabilitation of the habitat to suit a wider variety of bird life . An <unk> <unk> took place on private rural property over 1991 and 1992 , which reportedly resulted in an increase in species diversity . 
