Many birds are injured or killed by flying into windows. It appears that birds don't see windows. Can tilting windows down so that they reflect earth rather than sky reduce bird strikes? Place six windows at the edge of a wood: two vertical, two tilted 20 degrees, and two tilted 40 degrees. During the next four months, there are 53 bird strikes: 31 on the vertical windows, 14 on the 20-degree windows, and 8 on the 40-degree windows. If the tilt has no effect, we expect strikes on windows with all three tilts to have equal probability. Test this null hypothesis. What do you conclude?