Burchell's Army Ant Eciton burchellii

Army ants: the ultimate raiders. Massive coordinated swarms of millions march across the rainforest floor raiding everything in their path. This New World species displays extreme worker polymorphism—different castes with dramatically different sizes, each suited for specific roles. They're nomadic, constantly relocating their bivouacs, and formidable predators. Witnessing an Eciton raid is witnessing millions of tiny hunters acting as a single superorganism.