You can do anything with visual effects these days, and you don't need a big budget studio to do it. I'll believe this when the scientists who have dedicated their lives to studying these things speak up and confirm it. Until then, great job to whatever effects artist put this together.
Imagine if there's actually some scientist out there who's been quietly cloning extinct animals and releasing them back into the wild..........................
Until then, great job to whatever effects artist put this together. 
