Fungi and slime molds.
Dead matter on the forest floor.
It forces her to clamp down in a death bite. And cordyceps reveals its gruesome nature.
After three weeks of growth, cordyceps can release its own spores. Infecting more ants. Releasing more spores. Infecting more ants. Releasing more spores. Infecting more ants. Infecting more ants. More ants. More ants.
Just the right amount of fungus.