For the butterfly above, the dark gray outline is whipped backstitch. The blue lines are stem stitch, and the yellow knots are French knots. The purple curved lines are satin stitch, and the sea green filler is chain stitch. I just used DMC cotton floss, since I already have many colors on hand. You may also download this pattern from the free patterns she offers.
If you want some other lovely, free patterns, check out my friend Linda Stubbs' blog at www.prairieflowerfarm.blogspot.com She is a fabric artist, and you can sign up for her free patterns along the right side of her blog. You can also access her store from her site where she sells some of her work.