Suppose you nab a Modron away from his usual kip on Mechanus and stick 'im in the Beastlands. What sort animal do you suppose pops out of his face?
Modrons may not have enough "wild nature" for the plane to affect. If it does, I'd say they're all affected the same way: probably ants or bees.
Giant frog, of course.
From a logical standpoint? I'd have to go with some kind of hive insect.
For amusement's sake? Giant squirrels.
Oh please, its not like the Modron March ever hurt anybody!
— A Clueless just before being trampled to death by two dozen Modrons
Modrons may not have enough "wild nature" for the plane to affect. If it does, I'd say they're all affected the same way: probably ants or bees.