After getting pwned by the Giant Scorpion I was raised (Had reraise on) and I was resting healing myself I got hit by one of these bats. So its has to be the low HP if not it detects by smell. And if it is that case... We never aggroed any of them on the way to the scorpion. We were trying to get the scythe.
Weird.... I was trying to get to the outpost in the Glacier and running through the Pass with Sneak and Invis on, I was aggro'd by one of these bats, then another linked as I was fighting the first one.
I definitely had SNEAK and INVIS on at the time of the aggro.
Bug? Anyhow, warped when the 2nd linked. Can't afford to die anymore this week. Heh.
long time ago i can remember i died in Ranguemont pass because i aggroed "something" when going through a group of mob... after that i was dead because there was like 2 gobs and some bats... i had invis/sneak i am pretty sure of that i didnt check wich mob actually aggroed me. One thing i noticed is that i aggroed the mob when i was walking on a part of the floor that was covered by water... so its a guess i know it seems strange but -maybe- (if we decide that it was a Stirge that aggroed me and according to other people talking about weird aggro) Stirge could aggro you if you walk in the water close to them... even with sneak/invis.
Thats just a guess i still have to test that. I will tell you when i find out.
How was your health? Some bats aggro low health. When health is red invisible and sneak are irrelavent. The Flesh mobs in Garlaige Citidal are like that...just a thought.
ive walked by these plenty of times with sneak and invis on my way out to do stuff in fei yin. i have never been aggroed. it must be an HP thing. as the above poster said. im just confirming that.