!!! A new dinosaur shifter, shortly after the latest Jurassic Park movie. The poor person would freak out hard. Justifiably! Does the SCB also keep an eye out for new shifters? It probably doesn't happen very often.
If it's animals that are revered/feared, which makes a lot of sense, the likelihood that there are people shifting into mythical animals is also high. A dragon-shifter in the middle ages, heck yeah.
There would probably be some limitations on that. People shifting into existing animals shift into these actual animals and not into what they think these animals look like.
Ah well, it's magic, clearly anything goes ;)