Vampire bats need to eat often, and their only food is blood. When one bat is unsuccessful at gaining a meal, it returns to a communal roost where another, often unrelated, bat is likely to give it a small amount of food. Work by Carter and Wilkinson (2015) suggests that this arrangement meets the conditions needed for

Question

Quizplus · Accepted Answer

This behavior is an example of reciprocity, where one bat helps another with the expectation that the favor will be returned in the future, meeting the conditions for reciprocal altruism as described by Carter and Wilkinson (2015).

Vampire Bats Need to Eat Often, and Their Only Food