not much to say about swarms, they could appear in one of the scenarios in Strange Aeons, so I figured I'd make some. Swarms could be of anything you can think of, most often snakes, rats, scarabs (will do those once I move to Egyptian gaming), Black Cat bases even has little turtles :D. Talking of Egypt, not related at all, but when I was younger I looooved Ancient Egypt and everything related to it. The passion has since passed, but I will play that eventually for sure!
So, I wanted to make rat swarms myself, but figured it would take too much work for something that I won't be using too much. So, what I did was spend (mostly) excess putty that I had mixed, rolled it into little sausages and put it on the bases. Do that for a couple of months, paint them and voila - snake swarms! Now that I'm reading King in Yellow, I figured I'd be way more satisfied with swarms of white maggots...utterly disturbing! But hey, those are done, so I will leave maggots for another time.
They're painted in 4 different colors to give them some variety. Nothing special up close, decent on a table top!