Why Birds Tap on Windows

A Swedish woman found herself puzzled when a bird repeatedly tapped on her window. She captured the behavior on film and sent it to a Swedish nature site, seeking answers to her question: Why do birds knock on windows?

“I have a bird, I think it’s a Hawfinch, that sits and pecks at my window every day. It has been doing this for about two weeks now. He’s beautiful to look at, but not as beautiful when he wakes me up on weekends at 8:00 AM,” wrote Ina Alvö.

She also attached a video of the bird in action.