Guess so, thought maybe there was some horribly wrong detail that you'd knew only if you knew enough about the original work, but guess not.
It is kinda weird how the upper part of the background has a dramatically different perspective from the lower half.
Not sure about it, I thought the same at first, but I think this is caused by the frame being too narrow, making it seems like it's some perspective, but the butterfly are "flat" and the rest of the background, if you look at it more closely, doesn't really have perspective.