University of Massachusetts researchers identify world's loudest birds

Researchers from the University of Massachusetts Amherst have identified two new contenders for the title of the world’s loudest birds: the bare-throated bellbird and the red-legged seriema. A study published in the journal Evolution reveals that both species produce vocalizations exceeding 120 decibels, a volume comparable to a jackhammer or a chainsaw.

Using specialized tools such as laser rangefinders and portable sound level meters, biologists Jeff Podos and João C. T. Menezes measured 123 bird species across Massachusetts and Brazil. The findings indicate that the bare-throated bellbird achieved a peak volume of nearly 131 decibels. While the white bellbird previously held the record at approximately 125 decibels, these new measurements suggest the bare-throated species may rival or surpass it depending on the specific acoustic criteria used.

The study also explored physical traits associated with high-volume calls, noting that larger birds with wider beaks and robust muscles tend to produce louder sounds. However, researchers noted that the specific evolutionary advantages and ecological reasons for such extreme loudness remain a mystery.