Sure, I've done that. It usually takes some work, though. I have to know what the creature is, how it functions, some details about it... it's not just by sight, I have to understand what it is.

[Deftly she threads another braid, adding a new flower to the set. She's making a crown, it's going to be hella cute.]

Sometimes if it's close enough to another creature I know, though, I can fake the rest and just have it look the way I want it to.