From the "Caring for your leech" external link: In many ways, a medical leech Hirudo medicinalis can be an ideal pet. Its’ needs are fairly simple and can oft

From the "Caring for your leech" external link: In many ways, a medical leech Hirudo medicinalis can be an ideal pet. Its’ needs are fairly simple and can often be left for a considerable length of time with little concern and if allowed can become attached to the owner quite literally!