Other butterflies will only lay eggs on specific plants such as the famous Monarch butterfly (Danaus plexippus), which lays eggs on, and whose caterpillars eat only Milkweed plants (Asclepias spp.). The female, after mating with a male, will seek out an appropriate host plant on which to lay her eggs.
The iliac crest is the curved superior border of the ilium, the largest of the three bones that merge to form the os coxa, or hip bone. It is located on the superior and lateral edge of the ilium very close to the surface of the skin in the hip region. When a person places their hands on their hips, it is the skin above the iliac crest that they rest their hands on.
In human anatomy, iliac vein refers to several anatomical structures located in the pelvis 1  : Common iliac vein, formed by the external and internal iliac veins, drains into the inferior vena cava. Deep circumflex iliac vein, formed by the union of the venae comitantes of the deep iliac circumflex artery, and joins the external iliac vein. 2  External iliac vein, terminates at the common iliac vein, drains the femoral vein. 3  Internal iliac vein, terminates at the common iliac vein, drains pelvic organs and perineum.