Vampires’ gift of ‘blood honey’

A Maryland biologist probes the unusual dining behaviors of a blood-thirsty bat.

By Susan Milius, 16:43 PM October 25, 2013

Going as a vampire for Halloween? To be truly “authentic,” you might want to pee a lot. And often. That’s what vampire bats do, explains Gerald Carter. A bat ecologist, he works at the University of Maryland, in College Park. There he manages a small colony of the blood diners, studying their feeding behaviors.

To get a decent meal, bats must drink a lot. But blood is mostly water. So to extract nutrients from their soupy meal, these animals need to eliminate a lot of liquid waste. Pee. In fac...

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