why do city birds bring cigarette butts to their nests use smoke out parasites City birds use cigarette butts

City birds use cigarette butts to fight nest parasites: City birds are using cigarette butts in their nests to reduce parasites, but the toxic tradeoff may come with hidden risks for chicks. # City birds keep surprising us, and this habit is one of the strangest yet. Some species now tuck used cigarette butts into their nests, and the reason may be brutally practical. According Butts for birds New Zealand Geographic City birds use cigarette buds in their nests as pesticides?, Sources:, 1) Urban blue tit nests and cigarette butts: accidental litter or adaptive behaviour? (Animal Behavior), 2) Incorporation of To protect their nests from parasitic mites, urban birds line their nests with used cigarette butts. The use of nicotine as a pesticide is natural. City birds are using cigarette butts for pest control. House sparrows and finches line their nests with smoked filters. The nicotine left behind repels parasites like mites and lice. It's a

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