why do city birds bring cigarette butts to their nests use ward off ticks 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. # Marlboro palace: how city birds feather their nests The Independent The Independent Why Some Birds Seem to Be Developing a Cigarette Habit The New York Times Birds are developing a 'cigarette habit': Scientists reveal the surprising reason The Times of India Why do these birds build their nests with cigarette butts? Animal Behaviour Earth Touch News

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