Locusts might be fun.
"Compared to previous infestations in the region, the 1874 plague was significantly more damaging. The invasion coincided with a record drought in the Midwest and Great Plains, which induced the grasshoppers (estimated at 120 billion to 12.5 trillion) to not only thrive but also to swarm when local vegetation was decimated. The arriving locusts would pile up to over a foot high and ate crops, trees, leaves, grass, wool off sheep, harnesses on horses, paint from wagons, and pitchfork handles.