Patrols and surveillance have been increased in national parks in a bid to catch people felling trees for firewood.
Parks Victoria has been running an operation targeting illegal activity since last month.
A man was last week charged with several offences after being caught with two cubic metres of wood taken from the Chiltern-Mount Pilot National Park.
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His vehicle, three chainsaws and the wood were confiscated.
Parks Victoria spokesman Chris Mercier said significant hollows providing habitats to mammals, reptiles, birds and invertebrates had been cut down.
Six other people will be charged with offences, with a total of three cars, six chainsaws and seven cubic metres of wood seized during the operation.