I saw this on a YouTube video, made by Alex Sally, Incredibly simple tip to prevent birds flying into window. It only took me eight years to find this video.
I have had birds of all sizes crash into one particular upper window of our home.
After watching the video, I went out and found a white marking paint/pen for less than $3.00,
I drew about a four inch tic tac toe board on the window, and the bird hits have stopped! Such a cheap and easy fix!
