Wow. That is a very unique concept, writing from the point of view of a harpy! I was fascinated. You have a very good writing style, and I didn't notice anything on the first reading to distract me from my focus on finding out, first, what the narrator was, and after I found that out, if she got away safely.
I have a hard time believing a harpy can be likeable enough to be a main character- and she does sneer at the people she's stealing from, and has threatened them- but I would definitely read on to find out. I'm sorry, I don't have much to say about this one because your writing is excellent, and the way you introduce the harpy is interesting and makes us care about what happens to her. I'm just very startled at the concept, and while I would read on there would be a little bit of distance there, because I know what harpies are generally thought to be like, and it would be hard to identify with that sort of character. Usually as a reader I like to put myself in the main character's shoes- here that would be hard, is what I'm trying to say. But it's very well executed!