Word: flyways
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Dates: during 1950-1959
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...important flyway of migratory birds, says the Audubon Society, passes over Manhattan Island, and the birds have been having increasing trouble with man-made mountains poking their tops into their right of way. Birds generally fly at night, and when the sky is clear, they keep well above New York's highest buildings. But a low ceiling of turbulent clouds often forces them down to levels where they may tangle fatally with glass and brick and steel. Powerful lights on the tops of buildings seem to attract and confuse the birds. Sometimes the sidewalks around the Empire State have...
...Naturalist Terres it was an old story. The 1,472-ft. Empire State Building, which is on the migratory flyway that leads down the U.S. East Coast, is a major obstruction to bird navigation. Migrating birds lack the dependable blind-flying instruments that enable an airplane pilot to fly with equanimity through dense clouds. Preferring to fly under a low ceiling, they often crash by hundreds against the Empire State. For some unexplained reason, they do not seem to hit mountains, and Manhattan skyscrapers almost as high as the Empire State seldom kill many birds...