4: Leafcutter Ants

Meet the mighty leafcutter ants—some of the world's first farmers—which use their leafy haul as the fodder for a fungal garden that feeds a colony of millions. This is the fourth installment in a series of video journals by Dr. Corrie Moreau and her team documenting their 2012 expedition to catalog and study ant diversity in Costa Rica's Guanacaste region.