Bats are mammals of the order Chiroptera. With their forelimbs adapted as wings, they are the only mammals capable of true and sustained flight. Bats are more manoeuvrable than birds, flying with their very long spread-out digits covered with a thin membrane or patagium. The smallest bat, and arguably the smallest extant mammal, is Kitti's hog-nosed bat, which is 29–34 millimetres in length, 150 mm (6 in) across the wings and 2–2.6 g in mass. The largest bats are the flying foxes and the giant golden-crowned flying fox, which can weigh 1.6 kg and have a wingspan of 1.7 m. 蝙蝠是翼手目哺乳動物。它們的前肢被改造成翅膀，是唯一能夠真正持續飛行的哺乳動物。蝙蝠比鳥類更具機動性，它們的手指伸展得很長，上面覆蓋著一層薄薄的薄膜或翼膜。最小的蝙蝠，也可以說是現存最小的哺乳動物，是基蒂的豬鼻蝙蝠，長29-34毫米，翅膀寬150毫米（6英寸），質量2-2.6克。最大的蝙蝠是飛狐和巨大的金冠飛狐，它們重1.6公斤，翼展1.7米。The name "Chiroptera" derives from Ancient Greek: "hand" and "wing". An older English name for bats is flittermouse.

The second largest order of mammals after rodents, bats comprise about 20% of all classified mammal species worldwide, with over 1,400 species. 蝙蝠是僅次於齧齒動物的第二大類哺乳動物，約佔全球所有分類哺乳動物物種的20%，有1400多種。兩隻鼠姑娘在路上相遇：“哎，我最近交了個男朋友！” “是嗎？快拿照片給我看看！” “呀，怎麼這麼醜哇！” “醜是醜了點兒，可他是個飛行員吶！”

Bats provide humans with some direct benefits, at the cost of some disadvantages. On the benefits side, bat dung has been and in many places still is mined as guano from caves and used as fertiliser. Bats consume insect pests, reducing the need for pesticides and other insect management measures. They are sometimes numerous enough and close enough to human settlements to serve as tourist attractions, and they are used as food across Asia and the Pacific Rim. On the disadvantages side, fruit bats are frequently considered pests by fruit growers. Due to their physiology, bats are one type of animal that acts as a natural reservoir of many pathogens, such as rabies; and since they are highly mobile, social, and long-lived, they can readily spread disease among themselves. If humans interact with bats, these traits become potentially dangerous to humans. 蝙蝠給人類帶來了一些直接的好處，但也有一些缺點。在好處方面，蝙蝠的糞便過去和仍然在很多地方被當作洞穴中的鳥糞開採，並被用作肥料。蝙蝠消耗害蟲，減少了對殺蟲劑和其他昆蟲管理措施的需求。它們有時數量足夠多，距離人類住區足夠近，可以作為旅遊景點，在環亞洲和太平洋地區被用作食物。在缺點方面，果蝠經常被果農視為害蟲。由於它們的生理學，蝙蝠是一種動物，是許多病原體的天然宿主，比如狂犬病；而且，由於他們具有高度的流動性、社交性和長壽性，他們很容易在彼此之間傳播疾病。如果人類與蝙蝠互動，這些特徵對人類來說就有潛在的危險。

Bats are the only mammals capable of sustained flight, as opposed to gliding, as in the flying squirrel. The wings of bats are much thinner and consist of more bones than the wings of birds, allowing bats to manoeuvre more accurately than the latter, and fly with more lift and less drag. 蝙蝠是唯一能夠持續飛行的哺乳動物，而不是像飛鼠那樣滑翔。蝙蝠的翅膀比鳥類的翅膀薄得多，由更多的骨頭組成，這使得蝙蝠比鳥類的翅膀能夠更準確地操縱，並以更高的升力和更少的阻力飛行。

When not flying, bats hang upside down from their feet, a posture known as roosting. When on the ground, most bats can only crawl awkwardly. A few species such as the New Zealand lesser short-tailed bat and the common vampire bat are agile on the ground. 當蝙蝠不飛行時，它們會從腳上倒掛，這種姿勢被稱為棲息。在地面上，大多數蝙蝠只能笨拙地爬行。紐西蘭短尾蝙蝠和普通吸血蝙蝠等少數物種在地面上動作敏捷。

Batman is a superhero who appears in American comic books published by DC Comics. Kane, Finger, and future DC writers accompanied Batman with supporting characters, including his sidekick Robin, allies Alfred Pennyworth and James Gordon, and foes such as Catwoman, the Scarecrow, the Penguin, and his archenemy, the Joker.