House Finches introduced in eastern North America from western California stock in 1940 have become setablished in the east. The new population has developed slightly shorter wings and tails and markedly shorter tarsi and toes, but significantly larger bills than those appendages of the California population from which they were descended .
CITATION STYLE
Aldrich, J. W. (1982). Rapid Evolution in the House Finch (Carpodacus mexicanus). Journal of the Yamashina Institute for Ornithology, 14(2–3), 179–186. https://doi.org/10.3312/jyio1952.14.179
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