Data from: There is no such thing as a free cigarette: lining nests with discarded butts brings short-term benefits, but causes toxic damage

Monserrat Suárez-Rodríguez & Constantino Macías Garcia
Adaptation to human-modified environments such as cities is poised to be a major component of natural history in the foreseeable future. Birds have been shown to adapt their vocalizations, use of nesting places and activity rhythms to the urban environments, and we have previously reported that some species, including the house finch (Carpodacus mexicanus), use cellulose from smoked cigarette butts as lining material and thus reduce the number of ectoparasites in their nests, probably because...
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