Answer:
Microparasite expert at sucking the blood of mammals and birds
It is probably the most laidΒ-back member of the animal kingdom.
What build its house with earthen string and ensnares its prey with a biting sting?
A house has 4 walls. All of the walls are facing south, and a bear is circling the house. What color is the bear?
Slithery critters with a taste for dirt.
I hold two meanings. With one I may be broken, with the other I hold on. What am I?