Confronting photos of millionaire car dealer Tony Azzi, with a rifle over his shoulder, smiling and pointing at a wombat he had just shot, and another of a wombat bleeding profusely from a gunshot wound to the stomach, led to a flood of angry emails and calls to Mr Azzi's Larke Hoskins car dealerships.

Fairfax Media revealed that Mr Azzi is being investigated over allegations that he used a high-powered rifle and semi-automatic pistols to kill wombats and other native fauna.

Tony Azzi, left, and Nick Karagiannis with a dead wombat.

The investigation is being conducted by the National Parks and Wildlife Service (NPWS) after a referral from the NSW Police.