Thread:Paul.rea/@comment-4083360-20151210183342/@comment-4091815-20151211161733

In universe, the bestiary is the accumulated writings of various hunters throughout history. It may be wrong.

Our canon is based on what we observe. If we observe a bestiary page on screen we make note of it. If the information contradicts information that is already well-established, we make note of it but do not change our core cannon.

This thing started as a fan art project commissioned by the network for promotional purposes. The fact that they've used it on screen a couple of times is more a tribute to the good work of the artist and not the written content of the pages.