They are the only mammal that can fly; although there are a small number of rodents that can glide through the air, it is only the bat that has real wings.
它們是唯一會飛行的哺乳動物。雖然有少數飛鼠能在空中滑行，但哺乳類中只有蝙蝠具有真正的「翅膀」。