Headphones icon This story is best experienced with audio. Warning: This graphic requires JavaScript. Please enable JavaScript for the best experience. Birdsong can ...

March is a great time of year for people across the United States. The snow begins to melt, temperatures rise, and many birds begin to head north to breed and enjoy the warmer months. For many people, ...

Billions of migratory birds pass through the night sky each spring and fall. Birds use stars to orient their journey between summer breeding grounds and winter feeding grounds. The artificial lights ...