Harvest Watcher

From WoWWiki

The terrifying Harvest Watcher is a type of harvest golem, they are mechanical constructs programmed to hunt down and terminate the Human inhabitants of Westfall. Though their origin is uncertain, some believe that only the wily Goblins could have created these mechanical monstrosities. Some speculate they were originally designed to help the denizens of Westfall, like keeping away wild beasts and harvesting crops, but the Defias Brotherhood sabotaged them, along with the help of their mercenary goblin allies. Others suggest that the Goblins built them in order of the Defias Brotherhood to scare off the local inhabitants of Westfall so that they could run their smuggling operations with greater impunity. Whatever the case may be, the Harvest Golems have done their jobs well - eliciting terror in anyone foolish enough to roam the fallow fields of Westfall alone. They resemble giant moving scarecrows with scythe-like claws instead of hands.

The Harvest Watchers of Westfall wander about in most fields. They are required for the quest Quest:The Killing Fields and are immune to taunting.