An Overlooked External Character to Differentiate Myotis californicus and Myotis ciliolabrum (Vespertilionidae)

The observation of a perceived 4-mm tail extension beyond the border of the interfemoral membrane of the western small-footed myotis, Myotis ciliolabrum, and the absence of the free tail in the California myotis, Myotis californicus, stimulated a quantitative study to determine if the tail character...

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