The acacia tree is home to a colony of stinging ants that live in large thorns of the of the tree and use them as shelter. The tree provides the ants with food sources, a sweet nectar that oozes from the tree and tip of leaves. So what does the tree get? The ants protect the acacia tree from everything that touches the tree such as deer, humans, grasshopper to caterpillars. Serving like bodyguards, the ants will attack anything that may damage the tree. They will clear all vegetation and herbivores giving the acacia tree a big advantage to anything that comes near it. This is called mutualism relationship, where both species benefit one another.