The mule deer is a magnificent animal.  Its scientific name is Odocoileus hemionus.  The mule deer got its common name because it has a large body and long ears compared to its relative, the white-tailed deer.  These attributes give it a mule like appearance.

http://www.usbr.gov/mp/ccao/field_offices/new_melones/images/wildlife_mule_deer.jpg

If you would like to learn about other organisms, you should visit www.multipleorganisms.net and choose from the variety listed.