How blood-drinking vampire bats find their next meal

Last updated at 12:17
Vampire batPA

Scientists have figured out just how blood-drinking vampire bats seek out their next meal.

They realised the bat's nose is covered with heat detectors which guide it to hotspots of warm blood - usually on a sleeping cow, goat or bird.

Then the bat uses its razor-sharp teeth to cut into the animal - without waking it up - to get to its dinner of blood.

The bat's special spit prevents the cut from closing up - the blood keeps flowing until the bat's had enough!