红衣凤头鸟的歌唱(英文)

Female cardinals learn nearly as many songs as males but in only one-third the time, according to a new study that compared the results of his and her music lessons. In most bird species in temperate(温和的) climates, only the males sing. Among northern cardinals, however, both males and females become crooners(低唱者). This unusual arrangement offers a great