The bird known for its elaborate courtship dance is the **sage grouse**. Male sage grouse perform intricate displays, which include puffing out their chest and fanning their tail feathers while making unique sounds to attract females. These courtship rituals take place during breeding seasons on traditional dancing grounds known as leks. The males compete with one another for attention, showcasing their physical prowess and genetic fitness. This behavior is crucial for reproduction and plays a significant role in the species' mating dynamics in the grasslands of North America.