A recent profile in The New Yorker magazine of Robert J. Lang sent us to this website. Lang retired from a successful career as a physicist and engineer, during which he authored or co-authored over 80 technical publications and 40 patents on semiconductor lasers, optics, and integrated optoelectronics; he is now a full-time origami artist. His work is exhibited, and has also been used in television commercials and other media.
Lang writes and speaks extensively on the intersection of origami and mathematics, and has developed computer applications to simulate and help design origami. Dr. Lang resides in Alamo, California.
And yes, this "dancing crane" was folded from a single sheet without cuts. Lang's website has images of his work, many with crease patterns which (theoretically) one could use to reproduce the figure.