A wild boar carcass found in the Forest of Dean could be evidence the species is making a comeback to the area.
Wild boar can be aggressive if threatened
The animal, which was hit by a car, was at first thought to be one that escaped from a Cinderford abbattoir in January.
But experts say it is not the same boar and may be from a herd known to inhabit woods a few miles away in Ross-on-Wye.
Wild boar were hunted to extinction in Britain 300 years ago, but escapees from commercial farms have established new colonies.
The prospect of free-roaming herds returning to area is of some concern to Forest Enterprise, which manages the local woodlands.
Wild boar can cause a lot of damage to trees and can be aggressive if threatened.
Rob Guest from Forest Enterprise said: "There probably won't be much danger to yourself as these animals are quite shy and would probably run away.
"But if an uncontrolled dog became tangled with a boar, that's where the potential for problems would lie."