thanks for the reply. I was looking for creatures outside the norm. some thoughts:
I have decided on a giant croc, monstrous viper, and black dragon.
some other unusual heads offered in my other post include:
-bison
-rhino
-elk
also, can all the heads be attached to long necks for reach?
such suggestions spurred ideas like:
winter wolf/white dragon/polar bear
slug
saber tooth tiger