The RSPCA is appealing for public assistance to identify the source of a shocking video that shows a man gleefully running down a mob of emus with his vehicle.

The video appeared on social media on Wednesday evening and has since been widely shared by horrified users.

Likely filmed from a smartphone on the steering wheel, it appears to show the man speeding towards the emus on a dirt road. He's heard saying "f---ing emus" before the animals appear on the screen.

Up to 13 emus can be seen being mown down by the car as they run for their lives. Credit:Facebook

When they do, up to 13 emus can then be seen being mown down by the car as they run for their lives. The man, heard laughing throughout the clip and counting the emus as they go under his car, then flips the camera to selfie mode for a final hurrah.