The nightingale (scientific name: Luscinia megarhynchos) is a kind of European songbird (Xinjiang songbird) with reddish-brown feathers, which is famous for the sweet singing of male birds at night during the breeding season. The nightingale is a bird belonging to the order passeriformes, which was once classified as thrush of thrush family. But now it is generally classified as Cetaceae. Nightingale is a migratory insect-eating bird that lives in the forests of Europe and Asia. They nest in low bushes and migrate to southern Africa in winter. The nightingale is smaller than the European robin, about 15- 16.5cm long, with reddish brown feathers and red tail feathers, and pale yellow to white abdominal feathers. Male nightingales are famous for their beautiful singing, and even human singers envy their wide vocal range. The nightingale sings loudly and sweetly. Although nightingales also sing during the day, they mainly sing at night, which is obviously different from other birds. So the nightingale has the word "night" in its English name. Recently, scientists also found that nightingales cry louder in or near cities, in order to drown out the noise of cities.