Did you hear the story about the stranded whale with her baby off the coast of Australia (i think, could have been New Zealand). Rescuers had failed in all attempts to move/guide the whales to deeper waters. Just when they had resigned that the whales would probably die, a local dolphin swam by, communicated with the whales through sounds, and led them to safer waters. They didn’t even know dolphins COULD communicate with whales before this.
I think it is funny the way we define intelligence sometimes, as if an animal is intelligent if it can communicate with humans. But what does it tell us if our communication skills are so limited outside our species that a dolphin can do a better job than us?