The New Zealand long-tailed bat (Chalinolobus tuberculatus) is one of only three extant land mammals native to New Zealand. The New Zealand long-tailed bat has black to reddish- or chocolate-brown fur, which is paler on the underparts and darkest on the head and shoulders. The short, broad head bears proportionally small ears with rounded tips. The long tail, for which it is named, is nearly as long as the body and is almost entirely encompassed by the large interfemoral membrane that stretches between the hind legs.