Do vampire suck blood?

Vampire bats are depicted as huge creatures in horror films. Though, these mammals feed on the blood of other mammals including man, they are very small in sizes, not more than six to nine centimetres in length. The vampire bats are found only in Central and South America. 

They feed at night and suck the blood of horse and cattle. When the prey is fast asleep, it cuts away a small piece of skin with its razor-sharp teeth, usually on the neck or leg of the animal. its saliva contain a chemical that stops the blood from clotting. It when sucks up the blood oozing out from the wound.