A cuckoo clock is a mechanical timepiece that features a small bird, often a cuckoo, which emerges from a door to announce the time with a distinctive call. These clocks are typically made of wood and are known for their intricate designs and craftsmanship. They originated in the Black Forest region of Germany in the 18th century and have become popular decorative items. Cuckoo clocks operate using a pendulum and weights, which help regulate timekeeping. When the hour strikes, the clock's mechanism triggers the bird to pop out and produce its signature sound. Many cuckoo clocks also feature moving figurines or other animated elements that enhance their charm.