I have made a number of pieces with people flying on the back of a bird and each time it still delights me. The fact that it can “float” in the air is pleasing and in this case the character on the back has spent the last few years looking in a mirror lake so this is a wonderful bit of freedom for her.In every fantasy story where this occurs ( eg lord of the rings) or the hobbit it always is as part of an adventure and I guess flying with a bird in control leaves the future wide open.