Maximum Ride by James Patterson?

I just finished the first book and have a question. It said fangs wingspan was like 13 feet and in this picture max's wings are huge! a href="http://api.ning.com/files/ewPnclDBjQhOg-OKGkdtFlHEoXFRxXRFO7lfZRuit09bNkp17Qcf3*2IPQCRZZ1ldaz3M7sBDnw6vS7hYUYeikmWlstEWK8q/MaximumRideMax.jpg" rel="nofollow"http://api.ning.com/files/ewPnclDBjQhOg-…/a So my question is, how in the world do they hide their wings?! the book said their wings went into their sides but im still confused. I know its all fiction but still!