KANGAROO numbers in the Flinders Ranges are recovering from the drought years.The roos are putting motorists on edge as they are forced to dodge them.
Some locals say they see up to 100 roos on the roadside in an evening and an increasing number are being hit.
Environment Department data for the past five years shows numbers dipped in 2009-10 but are rising again.
Flinders Ranges red kangaroo numbers jumped from 101,480 in 2010 to 241,910 this year, grey kangaroos jumped from 15,480 last year to 21,785 this year and euro numbers rose from 266,600 in 2010 to 300,140 last year.
Environment Department national parks and wildlife director Greg Leaman said too many kangaroos could cause problems for pastoralists and motorists.
"People who are regular drivers in the country understand and drive accordingly, however international tourists sometimes get a bit surprised or caught out," he said.
Mr Leaman said kangaroos were incredibly responsive to the seasons and would stop breeding in droughts.
"We went through quite a lengthy period of drought; then we had a couple of wonderful wet years and they've bred up in response," he said.
Air Wilpena pilot Mia Angus, who is based at the Wilpena Pound Resort in the Flinders Ranges, said the abundance of kangaroos made night driving difficult and some tourists had arrived at the resort with damaged cars.
Lynette Rasheed, who owned and managed the resort with her husband, Keith, until 2008, said a lot of kangaroos were being hit on roadsides where they ventured to eat new grass.
Up to 15 per cent of the kangaroo population is commercially harvested.
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