You dropped something sweet on the ground and within minutes many ants collected around it.
Some animals can find their friends by their smell. The animal world is full of examples of amazing senses!
It is believed that animals that are awake in the daytime can see some colours. Those animals that are awake at night can see things only in black and white colours.
Birds also give alarm calls to warn about the danger. Some birds even have different sounds for different kinds of dangers.