Leaf-Cutting Ants Harvesting Leaf Pieces (video) Smithsonian Tropical Research Institute Loading video... Caption Leaf-cutting ants harvest leaf pieces to fertilize their fungal crop in underground nests. Smithsonian scientists find that both the ants and the garden fungus reject other fungi growing inside the leaf pieces. Credit STRI archives Usage Restrictions Please credit: STRI archives Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.