The bats were held for up to 18 hours to make sure their last meal was fully digested. The vampire bats were fed with cow's blood enriched with one of two labeled amino acids — glycine or leucine.

Vampire bats hunt only in the dark and they feed on their prey only after the sun is set. The bats use their ultrasonic navigation and venture out in search of their prey.

Twenty-four vampire bats were captured from Belize and fed enriched cows' blood for the Canadian study. YouTube This content is provided by YouTube , which may be using cookies and other technologies.

Vampire bats made to run on treadmills in a lab reveal secrets of the special metabolism fueling them from blood consumed only minutes before. This is peculiar since in most animals, including ...

The common vampire bat (Desmodus rotundus) doesn’t stick to flying for moving around. It also scurries along the ground in targeting cattle, horses and other mammals to steal blood.

Beyond spooky: Vampire bats weave surprisingly complex social webs. There’s more to the common vampire bat than just blood-sucking. Research tracks their relationships and sharing of blood meals.

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Vampire bats are small mammals, weighing less than two ounces, with wingspans of 12-15 inches, according to Texas Tech University. Same bat time: They eat insects, pollinate plants.

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Credit: Daniel Romero/VWPics/Universal Images Group via Getty Images. Researchers found 13 genes which they believe relate to critical adaptations for vampire bat survival and success.