Sibley on birds and windows

Have people seen this blog post by David Sibley on ways of keeping
birds from hitting windows? The promising possibility he's found is
marking a grid on the window with fluorescent yellow highlighter.

http://sibleyguides.blogspot.com/2007/11/simple-method-for-bird-proofing-windows.html

More research is needed, though.

--
Jerry Friedman
.

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