First, I drew the bird in my sketchbook.  After that, I copied the image (on my printer) onto some fabric transfer paper, then ironed it down onto fabric.  (You can see that it flips the image).  One tip: Make sure the image is dark enough to stand up to the other colors in the fabric swatch.  Sometimes a very soft pencil drawing fades out, so I add darker areas in pencil or Sharpie.