why do city birds bring cigarette butts to their nests are developing a 'cigarette habit': Scientists reveal the surprising reason Birds and the City

Birds and the City Disturbing Photo Shows a Black Skimmer Feeding a Cigarette Butt to Its Chick Audubon Did you know? Some birds are using cigarette butts to build their nests Researchers say nicotine helps repel parasites protecting baby birds in the short term. But Birds use cigarette butts for chemical warfare against ticks New Scientist 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. #

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