Sarnak Hatchling
 

There are 2 spawn points that a sarnak hatchling will spawn. Perhaps this was overlooked in BETA, but it's certainly detrimental for any necro in their lower levels trying to complete the quest, as it's hard to sit in the spots where they roam to and kill the mobs.

I see 20 possible spawn locations. The other npcs which are the same level act as placeholders for them.