Two Muntjac deer have been reported in Dumfries and Galloway.
The deer are not native to the area and are thought to cause severe damage to vegetation. Scottish Natural Heritage Wildlife Operations Unit are investigating the incident.
The deer originate in China and, if they establish themselves in Scotland the SNH estimate it would cost up to £2m due to damaged crops and vegetation.
Stan Whitaker, from SNH, said: "Muntjac deer are among the most destructive animal pests in Britain."
More top news
A look ahead at the forecast for the Border region.
Leo Houlding is the first person to climb the 1,200m Mirror Wall in Greenland. He battled Arctic conditions to scale it with a team of five.
DR Collin, a fish trading company based in the Scottish Borders, says delays exporting its goods via Calais are costing it thousands.