 While the range of the noisy miner has not significantly expanded , the density of the population within that range has substantially increased . High densities of noisy miners are regularly recorded in forests with thick understory in southern Queensland , 20 kilometres ( 12 mi ) or more from the forest / agricultural land edge . Many of these sites have extensive road networks used for forest management , and picnic areas and walking tracks for recreational use , and it has been found that these cleared spaces play a role in the abundance of noisy miners in the forests . There is evidence to suggest that higher road densities correspond with higher noisy miner population levels . Field work in Victoria showed noisy miners infiltrated anywhere from 150 to 300 m ( 490 to 980 ft ) into remnant woodland from the edges , with greater penetration occurring in less densely forested areas . This has implications for the size of woodland habitat needed to contain miner @-@ free areas — around 36 hectares ( 89 acres ) . Revegetation projects restoring buloke woodland , a species of she @-@ oak integral to the survival of the red @-@ tailed black cockatoo ( Calyptorynchus banksii ) , have been interplanted with a nurse species , usually fast @-@ growing eucalypts . Noisy miner populations were more likely in those buloke woodlands where eucalypts had been planted at densities of up to 16 per hectare ( 6 @.@ 4 per acre ) . The presence of noisy miners was accompanied by a substantial difference in number and types of other birds found in the woodland . 
 While the range of the noisy miner <a href='been_done' title='1'><mark>has</mark></a> not significantly expanded , the density of the population within that range <a href='been_done' title='2'><mark>has</mark></a> substantially increased . High densities of noisy miners are regularly recorded in forests with thick understory in southern Queensland , 20 kilometres ( 12 mi ) or more from the forest / agricultural land edge . Many of these sites <a href='got' title='3'><mark>have</mark></a> extensive road networks used for forest management , and picnic areas and walking tracks for recreational use , and it <a href='been_done' title='4'><mark>has</mark></a> been found that these cleared spaces play a role in the abundance of noisy miners in the forests . <a href='dey_it' title='5'><mark>There</mark></a> is evidence to suggest that higher road densities correspond with higher noisy miner population levels . Field work in Victoria showed noisy miners infiltrated anywhere from 150 to 300 m ( 490 to 980 ft ) into remnant woodland from the edges , with greater penetration occurring in less densely forested areas . This <a href='got' title='6'><mark>has</mark></a> implications for the size of woodland habitat needed to contain miner @-@ free areas <a href='uninflect' title='7'><mark>—</mark></a> around 36 hectares ( 89 acres ) . Revegetation projects restoring buloke woodland , a species of she @-@ oak integral to the survival of the red @-@ tailed black cockatoo ( Calyptorynchus banksii ) , <a href='been_done' title='8'><mark>have</mark></a> been interplanted with a nurse species , usually fast @-@ growing eucalypts . Noisy miner populations <a href='uninflect' title='9'><mark>were</mark></a> more likely in those buloke woodlands where eucalypts <a href='been_done' title='10'><mark>had</mark></a> been planted at densities of up to 16 per hectare ( 6 @.@ 4 per acre ) . The presence of noisy miners was accompanied by a substantial difference in number and types of other birds found in the woodland . 
While da range of the noisy miner done not significantly expanded , tdadensity of the population within that range done substantially increased . High densities of noisy miners r regularly recorded in forests witt thick understory in southern Queensland , 20 kilometres ( 12 mi ) or more from the forest / agricultural land edge . Many of these sites got extensive road networks used for forest management , and picnic areas and walking tracks for recreational use , and it done been found dat these cleared spaces play a role in the abundance of noisy miners in the forests . It is evidence to suggest that higher road densities correspond with higher noisy miner population levels . Field work in Victoria showed noisy miners infiltrated anywhere from 150 to 300 m ( 490 to 980 ft ) into remnant woodland from the edges , with greater penetration occurring in less densely forested areas . dis got implications for thdaize of woodland habitat needed to contain miner @-@ free areas ——ed around 36 hectares ( 89 acres ) . Revegetation projects restoring buloke woodland , a species of she @-@ oak integral to the survival of the red @-@ tailed black cockatoo ( Calyptorynchus banksii ) , done been interplanted w a nurse species , usually fast @-@ growin eucalypts . Noisy miner populations was more likely in those buloke woodlands where eucalypts done been planted at densities of up to 16 per hectare ( 6 @.@ 4 per acre ) . Thedaesence of noisy miners was accompanied by a substantial difference in number and types of other birds found in the dadland .