One of these things aggro'd on me after I'd just finished off a pretty tough rook. I was oom and had just two bubbles of HP left, so I decided against fighting it and ran for the Lakerathe zone to med up in peace. I had SoW... but couldn't outpace him... he hit me for minor damage and nipped at my heels all the way.
I conned one who was blue to my level 21 druid.. first one I'd ever seen who wasn't a greenie. I killed him without much trouble and got some exp and silver for my trouble... but the max level must be a bit off for these guys.
Found out the hard way that they CAN outrun SOW...good thing I was strong enough then to take one out! :) These are fairly weak and are not good for loot, but a good way to get introduced to the aviak city. Just remember the zone to lake ratheteer is nearby...if you can make it!