Hi Soy,
I just wanted to say - this story is amazing! I love the detail and it is one of the very, very, very few alien tfs i can actually find on the internet (I kinda have a fetish for alien/slime/tentacle tfs - which are all in the story)
. Hope you continue writing this story!
BTW, if its not too late, I vote for avian too, but maybe an alien kind of avian creature? That can fly much faster than a normal earth bird? Just a suggestion...