Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Observers have highlighted that wild birds are lining their nests with used cigarette butts in order to repel pests as well as to keep themselves and their family warm. Researchers have stated that wild birds have long protected their nests from mite invasion by importing chemical-emitting plants. But now, the birds seem to have found a much better and quicker way to remove the obstacles from their lives. Scientists have voiced out that this novel behaviour observed in urban birds fulfills one of the three conditions necessary to be regarded as self-medication: it is detrimental to parasites. By filling their nests with about 48 to 50 cigarette buts, the wild birds make use of the repellent properties of tobacco efficiently and effectively...