Maintenance for the week of May 25:
• PC/Mac: No maintenance – May 25
• ESO Store and Account System for maintenance – May 27, 6:00AM EDT (10:00 UTC) - 4:00PM EDT (20:00 UTC)
Is this the aftermath of bots or a zerg?

I had just done the quests at Shinji's Scarp about an hour before I took this shot and it didn't look anything like this at that time.