Bats are more closely related to humans than they are to rodents.
Several studies indicate that the Old World fruit bats and flying foxes may actually be descended from early primates. There are almost 1000 known species of bats, just about a fourth of all mammal species. Most of these bats would fit in the palm of your hand. Most bats give birth to only a single young each year, making them very vulnerable to extinction. They are the slowest reproducing mammals on earth for their size.