http://www.sciencemag.org/news/2019/10/watch-world-s-loudest-bird-scream-mate

When it comes to choosing a mate, female white bellbirds won’t settle for just any guy—they want a male that sings louder than any other bird in the world.

In a recent study, researchers measured the volume of white bellbirds’ mating songs and found the males belted out their loudest ones at about 125 decibels. That is close to the volume of the front row of a rock concert and more than 9 decibels louder than the loudest call of the previous record holder, the screaming piha, the researchers report in Current Biology.