Orcs of the Forest Race

The Forest Orcs were an orc-race of the second Age, specially trained fpr warfare in the woods and forests.They were bitter enemies of the Haladin and Drúedain.

Lotr RPG
In the LOTRRPG, the Orcs of the forest race are equated with the Orcish trackers.

Speculations
The Forest Orcs may have been bred from enslaved Wood-Elves or Drúedain.