When a crow feels sick… it visits an anthill. Sounds strange? It’s actually one of nature’s most fascinating healing rituals. When a crow senses it’s unwell, it will intentionally find an anthill, spread its wings wide, and remain completely still—waiting for the ants to crawl into its feathers. Why?Because ants release formic acid—a natural antiseptic that kills bacteria, fungi, and parasites hiding in the bird’s feathers.