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Study shows urban birds with darker feathers may be better at removing metal toxins


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(Phys.org) —A team of researchers in France has found a possible connection between the darkness of bird feathers and the removal of metal toxins from birds' bloodstreams. In their paper published in the journal Biology Letters, the team describes how they captured 97 pigeons in Paris and made measurements of toxic metals in their feathers at initial capture and then one year later and how it showed a difference based on feather color.


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