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| | Panamint Chipmunk DesertUSA |
 | | One species’ may have a comparatively long and thin baculum; another, a short and stout baculum; and still another, a variable-dimensioned baculum. |
 | | Female chipmunks regard this issue as an important distinction because a baculum is a penis bone, which is found in most mammals (although it is absent in humans, kangaroos and hyenas), and lady chipmunks have developed more skill than most trained biologists in identifying the males of their species. |
 | | Its baculum, you will be pleased to discover, has a comparatively small keel and short shaft with distinct ridges on either side of the tip, according to Troy L. Best, Robin G. Clawson, and Joseph A. Clawson, writing about the Panamint chipmunk for Mammalian Species. |
| www.desertusa.com /mag07/oct07/pchipmunk.html (2084 words) |
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