A global study by UW–Madison researchers reveals how habitat, geography, body size, and beak shape influence bird sounds.

Birds make sounds to communicate, whether to find a potential mate, ward off predators, or just sing for pleasure.

The planet’s birds make a lot of different sounds communicating a wide variety of messages. The petite Black-capped chickadee emits a high noise that tells predators to scram. Hungry Pileated ...