How many times a day does bat eat?

A bat's diet can vary greatly depending on the species, but most species of bat eat several times a day. Some species of bats, such as the common vampire bat, may only feed once every few days. Other species, like the big brown bat, may feed up to three times a night. On average, most species of bat eat about 10% of their body weight in food each day. This means that a 10-gram bat would eat about 1 gram of food each day.