Birds make sounds to communicate, whether to find a potential mate, ward off predators, or just sing for pleasure. But the conditions that contribute to the immense diversity of the sounds they make ...

Humans are a noisy species. Think about our amplified music, our cars and trucks, construction equipment, chainsaws, aircraft, wind farms and snowmobiles. There is no doubt that humans alter the ...

Birds are the master vocalists of the animal kingdom. They can make a remarkable variety of sounds. But why is a barred owl more of a baritone, while a cedar waxwing is a soprano? And what influences ...