Bird-shaped whistle from 15th c.

sketchfab

This hollow figure of a bird has a mouth piece in its front, indicating that it was a type of whistle. Partially filled with water and blown into, the whistle would warble like a songbird, hence the whistle’s shape. The original object was recently discovered in an archaeological dig around the childhood home of Martin Luther (1483–1546). See https://sketchfab.com/models/b7908d4fb06c49fc91d88a7ef8bd86dc# and http://here-i-stand.com/en/order#three-d-objects for more details.