Victoria's greater glider population is at risk of being wiped out as the state government allows "irresponsible logging experiments" that environmental groups say is "unethical" and unnecessary.

The greater glider is a small marsupial that feeds on eucalyptus leaves.

The Wilderness Society and the Goongerah Environment Centre Office say the state government-owned VicForests is conducting a controversial experiment in East Gippsland that it admits is "very likely" to kill greater gliders, bringing the forest species, listed as vulnerable, to extinction.

The two groups have called on the Andrews Labor government to act to protect the vulnerable species, saying it's ignoring its own scientific advice.

"VicForests admits it is killing endangered greater gliders when it logs its habitat so it can work out how many will survive," Wilderness Society Victorian campaigns manager Amelia Young said in a statement on Monday.