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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).* And I don’t think that will be many people.

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Feather Trails: A Journey of Discovery Among Endangered Birds–A Book Review

10,000 Birds

The Hawaiian Crows face much more destructive threats–extreme loss of habitat; malaria, the scourge of so many Hawaiian species; predators–rodents, cats and the ‘Io, the Hawaiian Hawk. This is the most intense, tragic section.