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Solid Air: Invisible Killer Saving Billions of Birds From Windows–A Book Review

10,000 Birds

An estimated one billion birds collide with glass each year in the United States* and most of them die; window collisions are considered the second highest cause of death of birds after cats (putting aside the big overall causes, like habitat loss and climate change).* It’s not a bad idea.

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The Incredulous New Caledonian Crows

10,000 Birds

This is something not seen in very young children but then typically develops and becomes observable and testable by psychology graduate students who have done innumerable studies on it. UCA distinction has shown this to be rare as well. You have probably heard about the famous New Caledonian Crows ( Corvus moneduloides ).

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