A pregnant elephant was seen walking miles to eat one specific plant

A researcher observed a pregnant Kenyan elephant travel to seek out and eat leaves from a particular tree species that local traditional midwives also use to induce labour, then give birth days later — a plant she wasn't otherwise known to eat. It's one of the clearest documented cases of an animal appearing to self-medicate for a specific physiological need, a behaviour called zoopharmacognosy.

— Studies on zoopharmacognosy in African elephants, Self-medication in animals — Kenya, reported in veterinary and ethology literature