Leafcutter Ants
These species of tropical, fungus-growing ants are all endemic to South and Central America and parts of the southern United States.
Next to humans, leafcutter ants form the largest and most complex animal societies on Earth. In a few years, the central mound of their underground nests can grow to more than 30 metres (98 ft) across with smaller, radiating mounds extending out to a radius of 80 metres (260 ft), taking up 30 to 600 square metres (320 to 6,500 sq ft) and containing eight million individuals.
Note the leaf on the left of the image and the other pieces of leaf being carried by the ants.
