It is frequently assumed, based on temperate-zone birds, that only the males sing; however, in 2009, Price, Lanyon, and Omland conducted a study that shows that both males and females of many tropical orioles sing.
It is frequently assumed-zone birds, that only the males sing. This was based on temperate. Price, Lanyon, and Omland conducted a study. This was in 2009. This was however. Both males and females of many tropical orioles sing. This study shows this.