Board Thread:False Info and Speculative Discussion/@comment-26353621-20150502210611/@comment-4091815-20150502222329

Shapeshifters, in the Teen Wolf universe, covers any creature on the which undergoes a transformation from one state to another. In the case of the Kanima the transformation is complete. For the Werewolf the transformation can be complete (see The Alpha Werewolf), partial as is the case with Scott McCall or they can, as we saw with Talia Hale fully transform into an animal.

The Wendigo transformations that we've seen in Muted and A Promise to the Dead seemed to consist of a change in eye color (glow) and the growth of very sharp teeth. Within the Teen Wolf universe this is consistent with all shapeshifter classification.

It's unknown if there is a further shift available to the Wendigo since we only have the two shown to judge.