Blood Feeders are named for getting their meals off a human or animal host. There are many different types of blood feeders such as bed bugs ,Mosquitos, and American Dog tick. Some blood feeders are known to carry illness and disease. One of the most talked about being bed bug. Very visible at about the size of an apple seed. They travel easily which is how they are introduced into a home and then spread from room to room, from bed to bed or from beds to other furniture.