Fox Squirrel, Sciurus, Aging Techniques, Age Criteria
This study was undertaken to determine the relative accuracy of fox squirrel (Sciurus niger rufiventer (Geoffroy) age indicators commonly used in the field and laboratory. Previous reports indicated that determination of age of squirrels by external morphological characteristics was inaccurate. Estimation of the ages of 211 squirrels indicated that the most accurate field methods were coloration and appearance of nipples of females and tail pelage and scrotal pigmentation of males. Estimating age by X-ray determination of the presence or absence of an epiphyseal line was the most accurate technique for dead specimens while change in tail pelage was the most accurate technique for living animals.
Proceedings of the Iowa Academy of Science
©1977 Iowa Academy of Science, Inc.
McCloskey, Richard J.
"Accuracy of Criteria Used to Determine Age of Fox Squirrels,"
Proceedings of the Iowa Academy of Science, 84(1), 32-34.
Available at: https://scholarworks.uni.edu/pias/vol84/iss1/7