Complex sentence: The average weight of these bats is ranged from eight to twelve ounces and the animals grow to 5.7 to 9 inches in length, with wings spanning up to 30 inches; males are generally larger than females.
Split into simpler sentences: The average weight of these bats is ranged from eight to twelve ounces and grows to 5.7 to 9 inches in length. It could have wings span up to 30 inches; though males are generally larger than females.