Well then maybe you could make a picture of Pterano's sister. (Petrie's Mother)
And I'll do the color change for Rinkus and Sierra pictures! Yeah I know they had sharpteeth in the movie. But the people that made the movie, did that to let us know that they were the bad guys of the 7th movie, I think.
I mean if you want to get technical, Pterano's kind were sharptooth flyers in real life. they ate small fish just like Rinkus and Sierra's kind were. Besides this is just fanfiction, so if we can, want to think that Pterano, Rinkus and Sierra were leafeater's before the change?