No. 43 of your top stories (January/ February 2017) talks about birds sleeping during flights. We live in the Catskill Mountains of New York state. Some years ago in the fall, my father was watching a very large V formation of Canada geese flying over our home. They were flying low, surprising us because the nearby mountains are high. The V flew directly into the mountain with great chaos and cacophony - the birds were all over the place in disarray.
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