for aesthetic, rather than practical reasons, most of the glued-on pieces of fabric are also embroidered with small stitches or small crosses, using 1 or 2 strands of yellow, red or gray embroidery thread.
The unembroidered pieces are given a 3D effect: the red wings, the white head, the piece of cloth and the eggs.
The large hen's legs are embroidered using the tambour or chain stitch (which creates a better raised effect), the eyes are made of black French knots.
Words can be added, making the most of the lines in the design: first, write them on paper to see how much space they'll take up, then reproduce them by freehand in pencil. The joined-up words are embroidered using the crewel or stem stitch.