In the early 2000s, one bird made up a new tune and it went viral across North America. I have an unscientific theory why.

It’s 2 a.m. You’re snoozing in bed. The sun hasn’t risen, but the robin has. It is tuk-tuk-tuk-ing at an unnatural hour, waking you up. If this has happened to you, you’re not alone. Around the world, ...

It can be rather soothing to hear singing birds throughout the day, even more so if you can hear them from inside your house.