How do birds cope with our increasingly noisy world?
The world is a noisy place, and that can pose problems for animals that depend on hearing each other’s sounds to find out about food, predators, and mates. Many species of mammals, birds, fish, and frogs produce louder, longer, or higher-pitch calls in noisy places, to be heard above the noise. But those altered sounds may not be good enough – they may not travel as far or convey the same information as normal songs.