I tried to hear them early enough to not trigger them but that hasn't worked (I have zero sound sometimes with the Ambr client, which doesn't help).
I assume it is bees from the sound they make and the damage they cause ... which is significant and has caused me many faints. I have tried running away as far as possible and then log out quickly which doesn't work, I have still wounds that need a poultice. And they are usually still there when I log back in.

How is a Newbie supposed to handle them? Is there a trick? I haven't found anything in the wikis either and they are a massive pain as they are so frequent, especially with the early quest of "Visit Mithras" that makes you run around so much.