- White bellbirds have the loudest known mating call of any bird - The males blast a song, which sounds like a melodic air horn, in the face of a nearby female - The birds (Procnias albus) reach about 125 decibels on average at the loudest point in one of their songs. https://www.sciencenews.org/article/white-bellbirds-have-loudest-known-mating-call-any-bird 4 comments science