I remixed this Ornithopter from Cyrus_Z, making it larger, cutting it into multiple pieces to make it easier to print on FDM machines, and added some details from the film.

Supports required on most parts. Orient the parts so a seam is lying on the print bed, or to whatever orientation you find minimizes supports the most OR prints best.

Lay the wing blade flat and rotate it ~45 degrees to fit it on the Ender 3 print bed.

Use small pieces of filament as pins to join smaller parts together, and use the included joiner block to securely attach the larger pieces. Some pieces just require manual alignment.