Instead of using words to communicate, the town’s inhabitants whistle in a manner similar to bird calls. If you haven’t yet mastered the art of whistling, give these techniques a try.

Learn how to create amazing bird whistle sounds using just a PVC pipe in this easy-to-follow DIY guide! With simple materials and a little creativity, you'll be able to make your own bird call ...

Very early whistles were made from hollow reeds or bird bones. By the 17th century, ceramic whistles were available, often in the shape of an owl or other bird. The center of the whistle held water.