Continuity mistake: At the start of the movie, Mrs Little scoops up baby Martha out of her cot and walks over to the bedroom window. She has the baby on her hip when she sits down at the window to see the birds but in the shot from outside the window, baby Martha is sitting on her mum's lap.
Continuity mistake: When Margalo is going out for "fresh air", her wing is still strapped with her scarf. As soon as she takes flight, Margalo's scarf is neat around her neck. I know that her wing isn't realy broken, but there was no time to untie it, unstrap it, put it around her neck and tie it, all while flying.