and another, cocobo rossi, tube-nosed bat, discovered in 2017 which made news for its resemblance to former hairstyle of 'n sync's lance bass. >> there's the honduran white bat which looks like a cotton ball. you have your flying foxes that look like puppies but then you have some really ugly bats like wrinkle face bats. i like the ugly bats more than the cute bats. >> a bat that only a mother and dan riskin can love. >> blood feeding bats, or vampire bats do exist. but they're only about .2% of all bat species. they live in central and south america and prey on the blood of birds, pigs and cattle. >> vampire bats are super weird among bats. they sneak up on a cow. they put their face up against the cow. they have heat sensors on their nose to tell where the blood is close to the skin. they shave the area with their teeth before they cut. they lick the area to clean it, then they make a little divot with their front teeth, and they put their jaw up against that hole and they lick and drink and pee. it is completely creepy. who else does that? >> i'll tell you who else. a serial kille