“Many scientists believe that the elk’s ivory teeth are the remnants
of tusks from the elk’s prehistoric ancestors and that they used to
be 6-8” long.
Elk are one of the few creatures that possess both antlers and
canine teeth, also called “ivories”, “buglers"and"whistlers”. These
teeth are located on the upper jaw near the front of the mouth. Elk
are the only North American animal, aside from the walrus, that have
ivory canines."
http://www.ganoksin.com/gnkurl/ep81f6
Elliot Nesterman