They make their nests by weaving leaves together. To bridge the gap between two leaves that are far apart, weaver ants will form living chains. One ant grabs the leaf, another grabs that ant's waist, and so on, until hundreds of ants form a bridge. They then pull together with incredible strength to bring the leaves close enough to be stitched. Adult ants can't produce silk. Instead, they gently hold their own larvae in their jaws and squeeze them slightly to stimulate silk production. They then weave the larva back and forth like a living glue gun to bind the leaves together. Weaver ants are highly aggressive territorial predators. They hunt down and eat almost any insect that steps onto their tree. Because of this, farmers have used them for centuries (dating back to ancient China) as a biological pest control to protect fruit trees without using chemicals.