WARNING – DISTURBING CONTENT: Authorities are investigating after photos emerged allegedly showing dead and dying koalas in a barren field on a Victorian property that has been logged.

Registered nurse Helen Oakley told Yahoo News Australia she spotted 60 displaced koalas on a property near Cape Bridgewater, and counted more than a dozen dead.

Ms Oakley said she has only managed to survey a small portion of the property, so she and a small team are spending their days walking up and down the rows of felled trees.

View photos The koala on the left was euthanised after it was discovered he had a broken arm. Many others have been found dead on the ground. Source: Supplied More

“You can smell them, it’s smells like death,” she said.

“The whole block has been flattened.

“The surviving koalas are being brought down from trees and the vets are checking them for hydration and malnutrition as they’re all covered in ticks.

“A lot of them have been euthanised.”

View photos A displaced koala sits in a pile of logs in Portland. Source: Supplied More

Ms Oakley first spotted displaced koalas from the road on Wednesday morning.

Portland resident Janet Bruckner said she joined Ms Oakley at the property and the Victorian department of environment (DELWP) was then contacted.

A DELWP spokesperson confirmed to Yahoo News Australia this morning that they are investigating.

‘They’ve realised the scale of it’

A small team of carers and two vets were sent out to help manage the situation on Friday, but Ms Bruckner believes the scale of the situation is more than they can manage.

View photos A dehydrated koala is given fluids after it was found on a logged Cape Bridgewater property. Source: Supplied More

She describes the situation as being “very confronting” and that a small exhausted team is working without regular breaks to provide treatment.

Ms Bruckner said she cannot understand how the Victorian government allowed this to happen and hopes increased public attention will lead to action.

“I think they’ve realised the scale of it,” she told Yahoo News Australia.

“It’s got to a situation now where you just can’t have this sort of thing happening.

“It’s right on a busy tourist road. It should never have happened in the first place.”

View photos A koala covered in flies was found amongst the logged trees. Source: Supplied More

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