Through a hands-on experiment learn more about bird calls and how birds use the calls to communicate. This lesson is part of a series. Select this text to learn more about the series and how to extend its usefulness.
Bird calls are usually short and to the point.
The same bird can have several very different sounds to express different things. A warning call can sound very different from a friendly call to a fellow bird of the same species. Through these calls birds can distinguish who is friendly and who is a threat. Fill each pair with water to the same level but different from the other pairs. Cover the outsides with construction paper so the water levels are not visible.