I'm trying to defeat 3 for the Snowfeather hatchling quest, and I've only seen 1 in half an hour (someone else was fighting it). I've been killing every Northern Hawk Owl critter I see, but no luck. Is the spawn on these just abysmal? Are they linked with something else that I need to kill?
It's a mix of factors. For a Hawk Owl (or any other Battle Pet) to spawn, it needs: 1) That its spawn location isn't occupied by a critter version. 2) That there aren't excessive battle pets around already.
I ran into the same issue this morning, with no "battle pet" Northern Hawl Owls to be found; but clearing one of the caves (that was filled to the brim with Rusty Snails) made them spawn in buckets!