Oh, how cute are those animals??? Maybe she was color blind or just had a bunch of green embroidery thread that she needed to use up. My mother-in-law was very sickly/old when my youngest DD was little and she embroidered a little quilt top for the new baby and it had a baby angel on it. She used dark brown thread for the baby. A little puzzling for our family - but I will finish it up to have on hand when my DD has a baby.