West Australian farmers are being urged to take greater care while using quad bikes after the death of an elderly man in the state's south.
WorkSafe WA says the 76-year-old did not return from performing checks on his farm at Elleker, west of Albany, on the afternoon of May 24.
He was later found dead.
He appeared to have been riding down a steep incline in wet and windy weather when he lost control and the bike flipped and landed on him.
A tank may have contributed to unbalancing the bike.
WorkSafe WA commissioner Darren Kavanagh says it is the third quad bike-related death on WA farms in the past 18 months.
"I'd like to offer my condolences to the family of the farmer killed in this unfortunate incident," Mr Kavanagh said on Thursday.
"Incidents involving quad bikes happen far too often on WA farms and in fact, all across the country."
The Commission for Occupational Safety and Health has established an agriculture working group to improve safety on WA farms.
The state government also held a farm safety summit last month with major players in the industry.
In April last year, a 51-year-old farmer died near Esperance when he was thrown from a quad bike while riding on a gravel path.
He was not wearing a helmet.
Four months earlier, a 17-year-old died when he came off a quad bike on a farm in the Great Southern region.
Mr Kavanagh said quad bike riders should always wear helmets and other protective gear and it was important to regularly service all farm vehicles.
"I encourage all employers who have quad bikes in their workplaces to consider the suitability of vehicles that offer more stability, for instance, the type of side-by-side used as a golf buggy," he said.