A person once saw a crow using a tool. The crow held a twig in its beak and poked it inside a branch to get out insects. That is a very smart thing to do. People use tools, and monkeys use tools. Sometimes otters use natural tools to break clams open on their chest.
Crows are very special birds because they know how to use something like a twig as a tool.
Crows have lots of ways of saying things with different sounds. A scientist named Dwight Chamberlain recorded twenty-three different calls that crows make. The sound that crows make is easy to recognize. The next time you hear something you think is a crow, listen. Look up and around and see if you can find the crow.