Throwing the Kroggs aside, I've recently completed my Zanatorian Interceptor Swarm. For the model I use Forge World's BFG Dreadclaw assault pods, which work pretty well for a swarm of small robots. Quite cheap too compared to other models. Too bad they are hard to photograph effectively due to their size.
Anyway these guys represent my Scarab swarms and as the name suggest they job is to intercept combat units before they hit my line and take the bullets for more important units like the destroyers and warriors.
I agree wit Soul, if they had vertabrae they would look so boss. But knowing how hard it is to do a good conversion, I understand why you may have choosen not to do so
I like how they are smaller than scarabs and stuff. Or about the same size. And yet I also like how they don't have resemblances to animals. Those stuff are for aliens.
Ok, another idea I just had. They look like just an engine basically, and I just thought how freaky it would be to have a swarm of flying robotic buzz saws chasing after me. So there you go, if you could find a way to add some sort of chainsaw/buzzsaw weapon into the model that would solve the lack of scariness issue I was mentioning.
Again, just throwing ideas around as they come to me.
But knowing how hard it is to do a good conversion, I understand why you may have choosen not to do so
looking at what wordbear said... he said everything i had though of
i sort of thought that they would look awesome if they were more like the small machines in Half life that that try to kill you with their saws
Again, just throwing ideas around as they come to me.