Jacob Macdonald, 20, (pictured) filmed himself deliberately mowing down emus while speeding down an Outback road

The young man who filmed himself deliberately mowing down emus in a four-wheel-drive begged his ex-girlfriend not to reveal his identity after the sickening footage went viral.

Jacob Macdonald, 20, from Pinnaroo, a tiny country town in South Australia near the border of Victoria, deleted his social media accounts after the video began circulating online.

Daily Mail Australia can reveal Mr Macdonald is the man in the video, seen laughing while running over the helpless birds and cruelly counting out the growing death toll.

The 20-year-old is a keen hunter who is employed on a friend's farm to do tractor and welding work, but went 'off the rails' after his latest relationship breakdown, according to his ex-girlfriend.

'He's the type to go hunting, he grew up that way but this is just atrocious. I was shocked and speechless... angry mostly,' she told Daily Mail Australia.

She claimed his mother was a police officer near the border of New South Wales and Victoria, while his father was a farmer in the NSW Riverina Region.

'His parents would be outraged by his actions,' she said. 'They're genuinely good people.'

Mr Macdonald (pictured) is a keen hunter who works on his friend's farm. He deleted his social media accounts after footage showed him hitting at least ten emus with a four-wheel-drive

She described Mr Macdonald as caring and protective when they were together, claiming their break-up in July had sent him down a destructive path.

'I ended the relationship end of July and he kind of went off the rails a bit after that, well obviously a lot now that we have seen this.'

'Honestly he deserves everything he gets,' she added.

The RSPCA said it was 'shocked and horrified' by the confronting footage, urging members of the public to come forward with any information.

An RSPCA spokeswoman told Daily Mail Australia staff were examining the footage to try and determine when and where it was filmed.

'Such sickening cruelty clearly has no place in our society,' she said.

'The RSPCA unequivocally condemns this type of violence, as it clearly shows a disregard for the lives of these vulnerable native animals, and raises grave concerns over this individual's capacity for such behaviour.'

The maximum penalty for someone found guilty of killing native wildlife in New South Wales is $22,000 in fines and up to five years in prison.

A mob of emus were filmed being run down by Mr Macdonald, who was wearing a sunglasses and a cap in the footage

The sickening footage was posted to Facebook by a man named Fabio Galletti, who pleaded with his followers to out the driver. A number of men were wrongly tagged in the post

The video was originally posted to Facebook by Fabio Galletti, who shared the clip and asked his followers to help him identify the emu killer.

Mr Macdonald - who was wearing sunglasses and a cap in the video - can be seen running over at least ten emus.

He can be seen panning the camera to his dashboard, appearing to show speeds of over 120km/h while maniacally laughing as the emus disappear under his bonnet.

'One, two, three!' he laughs as the birds are mowed down on the dusty road.

Social media users expressed their disgust at the disturbing video, calling for the man to be 'raped' and 'killed'

Melbourne man Harrison Hatzis, 19, was wrongly identified as Mr Macdonald, partly due to a photo on his Facebook next to an emu showing off his moustache

Earlier, Melbourne man Harrison Hatzis, 19, was wrongly identified as the man seen in the vision, partly due to a photo on his Facebook next to an emu and his facial hair.

Speaking to Daily Mail Australia, Mr Hatzis said he was desperate to clear his name after social media users threatened to rape and kill his family.

'You can guarantee it's not me,' Mr Hatzis said after receiving a torrent of abuse online when a stranger tagged him in the post.

'Hope you see this post and you come and get me you oxygen thieving scum,' one Facebook user wrote online.

Other social media users directly messaged Mr Hatzis on Facebook, threatening to rape and kill his family.

Mr Hatzis commented on Mr Galletti's post, saying: 'All these c***s messaging me thinking this was me yous are dumb c***s how do I even look like this c*** in the video.'

The stomach-churning footage has been viewed almost half a million times since being uploaded on Wednesday afternoon.