I need someone to help me understand the base raiding mechanics.  I have been seemingly randomly raided three times now.  There has not been a visual warning that things are amping up (i.e., "Larva want you gone.")  On top of that, I have killed literally zero bugs leading up to them, either.  There's not a meter or something that I don't know about where I can see how pissed a faction is/is getting, right?  I don't want to turn raids off-- but I'd like to understand what is happening, here.  Was something added in the most recent patch?  I've never experienced this prior to very recently.  I just don't get this.  Is anyone else experiencing this, as well?

I've been raided many more times in the same fashion since my original post.  It seems like it always happens right as I wake up from sleeping overnight.  I'll wake up in the morning, I hear the horn sound, and then a raid starts.  I really don't understand.  Who can explain the raid mechanic to me?

I think the larva only randomly raid you if you build defences like walls and you stay at your base for a long time.