• 4 Billion Birds Will Fly Through American Airspace This Fall

    2 monthes ago - By All About Birds

    Cornell Lab of Ornithology researchers used weather-radar data to count the numbers of birds crossing the northern and southern borders of the United States in fall and spring. View larger image.
    From the Autumn 2018 issue of Living Bird magazine. Subscribe now .
    Fall migration will bring 4 billion birds into the skies over the United States. That's not a guess-it's hard data, gleaned from the first-ever national bird count using weather radar.
    Cornell Lab of Ornithology scientists picked through data from 143 weather radar stations from 2013 to 2017 to provide the first large-scale...
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