t, mate, nest, raise their young, and learn to fly, and their unique way of communicating. Crows are known to roost in large numbers in the fall and winter for safety, protection from the weather, and to find a mate. Young crows start fledging when they are 30-40 days old, sometimes tumbling to the ground when their flying skills have not yet developed. Mature crows will mob predators to protect grounded youngsters, while encouraging the fledglings to fly to safety. Crows are extremely intelligent, social birds. Their language is unique and not entirely understood by scientists. This introduction to the natural history of crows for children also includes a brief discussion of the difference between crows and ravens.