MONOTREMES
'(<a href="http://www.j-archive.com/media/2001-10-05_J_30.jpg" target="_blank">Sarah of the Clue Crew reports from a zoo.</a>)  The platypus has a big old beaver-like tail, as opposed to <a href="http://www.j-archive.com/media/2001-10-05_J_30a.jpg" target="_blank">this</a> virtually tailless monotreme'
an echidna