Back in 1974-75, there were millions and millions and millions of black birds every day over Fort Campbell. They flew morning and evening. Flight operations around the Fort and area had to stop because of the birds. The skys were black on a sunny day with all these birds. They finally came in at night, in the winter and sprayed them to wash their protective oils off while they were in the trees sleeping. Then the cold killed them. Men in protective gear were out picking them up by the thousands and thousands and putting them in bags, taking them to the dump to bury them. But, if you saw it, you would not have believed how many birds were there.