An ornamental clock constructed in the form of a birdcage containing a mechanical singing bird. The clock movement is in the lower part of the cage and its dial is seen from below when it is hanging from the ceiling. Birdcage clocks were made in Switzerland towards the end of the 18th century, when mechanical singing birds in snuff boxes and similar luxury articles were popular, and when the mechanical musical box began to be made extensively. The term 'birdcage' is also applied to a type of turret clock.