Ravens use their beaks and wings much like humans rely on our hands to make gestures, such as for pointing to an object. "Gesture studies have too long focused on communicative skills of primates only," Pika said. "The mystery of the origins of human language, however, can only be solved if we look at the bigger picture and also consider the complexity of the communication systems of other animal groups."
Pika and her colleagues would like to further explore the gestures ravens use and discover their meanings. You can read their findings in their online article: The use of referential gestures in ravens (Corvus corax) in the wild