https://www.vice.com/en_us/article/bjw345/listen-to-the-loudest-bird-ever-recorded

The white bellbird, which lives in the mountains of the northern Amazon rainforest, is the loudest bird ever recorded, according to a study published on Monday in Current Biology.

Male white bellbirds belt out songs that are at least nine decibels louder than the previous frontrunner, the aptly named screaming piha, which also lives in the Amazon. These otherworldly calls are so ear-splitting that scientists were left baffled about “why females willingly endure these songs at such close range,” according to the study.