Birds’ nests and parasites Some birds use discarded cigarettes to fumigate their nests

https://www.economist.com/news/science-and-technology/21729739-they-help-keep-parasites-bay-some-birds-use-discarded-cigarettes-fumigate?fsrc=scn/tw/te/bl/ed/somebirdsusediscardedcigarettestofumigatetheirnests