What vampire bats do for their closest friends

When we think of vampire bats, friendship and co-operation may not be the qualities that come to mind for these blood-feasting creatures of the night. But maybe they should.

Scientists on Thursday provided a deeper understanding of social relationships among vampire bats, showing how those that have forged bonds akin to “friendships” with others will rendezvous with these buddies while foraging for a meal.

Researchers attached small devices to 50 vampire bats to track nighttime foraging in Panama, when these flying mammals drink blood from wounds they inflict upon cattle in pastures. The study involved female bats, known to have stronger social relationships than