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Blood doesn’t taste bitter to bats

By Sandstein (Own work) [CC-BY-3.0], via Wikimedia Commons

Blood doesn't taste bitter to bats

Vampire bats’ special blood diet has made them lose much of the ability to taste bitterness, BBC reports. Whereas most animals can taste the unpleasant flavor as a way to sense poisonous foods, the bitter taste receptors in the bats no longer function. The finding, published online this week in the Proceedings of the Royal Society B, suggests that because vampire bats live off only blood, they naturally avoid other venomous foods and don’t need to be able to perceive bitterness.

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