Clever animals are species known for their advanced problem-solving skills and ability to adapt to their environments. For example, crows can use tools to obtain food, demonstrating their intelligence. Similarly, dolphins communicate with each other using complex sounds and can even recognize themselves in mirrors, indicating self-awareness. Another example of clever animals is octopuses, which are known for their ability to escape from enclosures and solve puzzles. Elephants also show remarkable intelligence, as they can remember locations and recognize other elephants even after many years. These behaviors highlight the cognitive abilities found in various animal species.