In “Collision course” (SN: 9/21/13, p. 20), Susan Milius told the stories of two ornithologists working to develop windows that birds won’t fly into.
With few exceptions, readers were sympathetic to the plight of birds that either don’t see windows or incorrectly interpret reflections. William Thompson e-mailed about his Colorado home: “At the height of bird activity, we see about five such collisions per month with a 20 percent mortality rate. These collisions usually occur ...
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