The anatomy of a range expansion : changes in cranial morphology and rates of energy extraction for North American red squirrels from different latitudes

Abstract

Species with expanding ranges provide unique opportunities to examine environmentally induced adaptations in ecological traits and anatomical characteristics. Since the late 1800s, the North American red squirrel (Tamiasciurus hudsonicus) has expanded its range into the central hardwoods of the United States in conjunction with increasing agricultural… (More)

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