We are always using body language in our daily life. When we talk with each other, we may use body language. For example, in the USA, a person points to his or her head when he thinks someone is clever. However, human beings are not the only ones who use body language. Animals also use body language to tell each other how they feel and what they think. When a dog is happy, its ears will stand up, and its eyes will be widely open. When it is angry, it will look straight at you. If an elephant spreads its ears, it means "Watch out". To show friendship, elephants will touch each other with their trunks (象鼻). Dolphins (海豚) live in groups and like to show each other their feelings. An angry dolphin will sometimes slap (拍打) its tail on the water. A happy dolphin will play with its friends, making small jumps into the water.