30 Animals That Made Us Smarter - Spider and window glass

How can we prevent millions of birds from being killed by flying into windows? The solution could rest with spiders. Webs containing UV reflective threads deter birds from colliding with them. With Patrick Aryee.
To see our spider and window glass animation go to: www.bbcworldservice.com/30animals
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Published on Monday, 29th July 2019.

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