It may come as a surprise to learn that birds have been observed lining their nests with cigarette butts. While many people view discarded cigarette butts as an unsightly litter problem, birds seem to have found a practical use for them. Researchers at the National Autonomous University of Mexico have been studying the behavior of urban house finches, a species that has … [Read more...] about Birds Use Cigarette Butts for Chemical Warfare Against Ticks