A guy in Fort Worth showed me how he tapes his sliding door, and my cardinals have not hit it since
I was at a backyard birding meetup in Fort Worth two weekends ago and a guy named Dale pointed at his sliding glass door. He said he put white tape stripes 4 inches apart starting 2 inches from the top. I did the same thing on my patio door with painter's tape, and in 5 weeks I have had zero strikes after 3 the month before. Has anyone tried stripes spaced wider than 4 inches and still seen results?