Nest nests to farm fungi. Ant nests feature an elaborate colony structure that may extend or more underground. As the structure gets further underground, individual chambers become farther and farther apart indicating that the ant is aware of its depth. It is hypothesized that they accomplish this by sensing the level of carbon dioxide in the soil. The leaf cutter ant builds a complex nest which can house 8 million individuals. Its nests feature numerous chambers, most notably garden chambers where they farm fungus on leaves they harvest from the forest. Species such as the carpenter ant and the wasp "Polistes
Ant desiccation, so the ability to find the shortest route back to the nest reduces that risk. Diurnal desert ants of the genus "Cataglyphis" such as the Sahara desert ant navigate by keeping track of direction as well as distance travelled. Distances travelled are measured using an internal pedometer that keeps count of the steps taken and also by evaluating the movement of objects in their visual field (optical flow). Directions are measured using the position of the sun. They integrate this information to find the shortest route back to their nest. Like all ants, they can also make use of