Those of you who have seen gulls near the beach would have heard them communicating by screeching at each other. In a colony of gulls, all the little 
chicks will be crying at once and a mother gulls learns to identify the call of her own chicks.However, gulls use body language a lot in order to communicate with each other. The position of the head, and the way it stands, signals a gull’s intentions. An upright posture indicates that it is likely to attack. Sometimes, a gull will lower its head and pull at grass when it is feeling aggressive.
