Like toolmaking, teaching was once thought to be an exclusive capacity of the human mind. It’s not, but teaching is rare, and teachers are an elite group.
“Teaching” requires this: one individual must take time from their own task to demonstrate and instruct and the student must learn a new skill. That’s a tall order.
When a young chimpanzee watches a skilled adult and then imitates, that’s learning, but the adult has not taken time specifically to instruct, so it is not teaching. In the honeybees’ amazing waggle dance, the dancer takes time to indicate information about a source of food, but the other foragers learn no new skill. Same with certain ants; same with animals who alarm about the presence of a predator. They do take time to show, but they do not impart new skills to the learners.
Killer whales teach; they take time and impart skills. Around the Indian Ocean’s sub-Antarctic Crozet Islands, killer whales catch fur seal and elephant seal pups by surging onto beaches. But it’s dangerous. The whales risk stranding themselves and must thrash their bodies back into the rescuing surf.