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  • Title: Stable hydrogen isotope analysis as a method to identify illegally trapped songbirds.
    Author: Kelly A, Thompson R, Newton J.
    Journal: Sci Justice; 2008 Jun; 48(2):67-70. PubMed ID: 18700498.
    Abstract:
    We measured stable hydrogen isotope ratios in the primary feathers of two subspecies of goldfinches, confiscated by the Police and the Royal Society for the Prevention of Cruelty to Animals (RSPCA) on suspicion that they had been illegally taken from the wild. We found significant differences in the delta2H values of the two subspecies indicating that they were sourced from different geographical regions. Our results correlated with isotopic precipitation maps and with the known distribution of the two subspecies of goldfinch. We believe that this technique could be used by law enforcement agencies to determine the origin of birds in cases where the species or subspecies involved are geographically distinct.
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