Comparison of Regional Eggshell Porosity between the Brood Parasitic Brown-Headed Cowbird (Moluthrus Ater) and its Hosts: The Dickcissel , and Two Non-Parasitic Relatives, the Red-Winged Blackbird (Agelaius Phoeniceus) and the Common Grackle (Quiscalus Quiscula)
William Jaeckle
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