News This bird has the world’s loudest song, study finds. It attracts mates by screaming in their face October 22, 2019 N'dea Yancey-Bragg, USA TODAY Comments Off on This bird has the world’s loudest song, study finds. It attracts mates by screaming in their face The white bellbird only sings its loudest song when a potential partner is nearby. Researchers say its the loudest bird call ever recorded.