Four o'clock in the morning, cardinal. Cardinals often move in the morning, so they move from 4 am until dawn. Cardinal (scientific name: Cardueliscannabina), also known as red-billed finch and red-cheeked finch, is a passerine bird. He is small, about 12- 14cm long and weighs only 13- 16g. The cardinal's feathers are brightly colored, and the male's head and chest are bright red, the abdomen is pale pink, and the back is grayish brown; But the color of the female bird is light brown, and the overall color is dim.