An unused goblin design...
Looks a little like an alien. Anyways, this is a piece of artwork done by Andrew Baker, a creature and character designer at Weta Workshop. The selection he posted on his blog is particularly interesting because it includes several designs that were never used. It is even more interesting because it includes a lot of designs that were used. I hope you enjoy!
Unused Goblin Designs
Used Goblin Designs
Source: Artstuffs by Andrew Baker